Loading...
HomeMy WebLinkAboutAir PM Results December 2024Saturday, December 7, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/07/2024 8 AM Matter • 96 Level of Concern Moderate Hangar Fenceline - E Side 12/07/2024 8 AM 85 Moderate Hangar Fenceline - N Center 12/07/2024 8 AM 92 Moderate Hangar Fenceline - N Corner 12/07/2024 8 AM 64 Moderate Hangar Fenceline - NE Corner 12/07/2024 8 AM 87 Moderate Hangar Fenceline - NE Side 12/07/2024 8 AM 78 Moderate Hangar Fenceline - S Corner 12/07/2024 8 AM 63 Moderate Hangar Fenceline - S Side 12/07/2024 8 AM 83 Moderate Hangar Fenceline - SW Corner 12/07/2024 8 AM ** Hangar Fenceline - SW Side 12/07/2024 8 AM 74 Moderate • •24-Hour Hangar Fenceline - W Side Period • • 12/07/2024 8 AM Particulate Matter • 78 Level of Concern Moderate Legacy Road 12/07/2024 8 AM 79 Moderate Moffett and Tustin Ranch 12/07/2024 8 AM 40 Good Valencia and Armstrong 12/07/2024 8 AM 124 Moderate Valencia and Columbus Square 12/07/2024 8 AM 93 Moderate Valencia and Legacy 12/07/2024 8 AM 83 Moderate Victory and Tustin Ranch Rd. 12/07/2024 8 AM 71 Moderate Warner Avenue 12/07/2024 8 AM 81 Moderate Warner and Armstrong 12/07/2024 8 AM 86 Moderate Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Mq Hazardous 425 to 504 Health warning of emergency conditions: ever• • - likely • be affected. Sunday, December 8, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/08/2024 8 AM Matter 31 Level of Concern Good Hangar Fenceline - E Side 12/08/2024 8 AM ** ** Hangar Fenceline - N Center 12/08/2024 8 AM 29 Good Hangar Fenceline - N Corner 12/08/2024 8 AM 2S Good Hangar Fenceline - NE Corner 12/08/2024 8 AM 29 Good Hangar Fenceline - NE Side 12/08/2024 8 AM ** ** Hangar Fenceline - S Corner 12/08/2024 8 AM ** ** Hangar Fenceline - S Side 12/08/2024 8 AM 33 Good Hangar Fenceline - SW Corner 12/08/2024 8 AM 34 Good Hangar Fenceline - SW Side 12/08/2024 8 AM 26 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/08/2024 8 AM Particulate Matter ** Level of Concern ** Legacy Road 12/08/2024 8 AM 24 Good Moffett and Tustin Ranch 12/08/2024 8 AM ** ** Valencia and Armstrong 12/08/2024 8 AM 49 Good Valencia and Columbus Square 12/08/2024 8 AM 31 Good Valencia and Legacy 12/08/2024 8 AM 30 Good Victory and Tustin Ranch Rd. 12/08/2024 8 AM 27 Good Warner Avenue 12/08/2024 8 AM 29 Good Warner and Armstrong 12/08/2024 8 AM 26 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Monday, December 9, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/09/2024 8 AM Matter ** Level of Concern ** Hangar Fenceline - E Side 12/09/2024 8 AM 37 Good Hangar Fenceline - N Center 12/09/2024 8 AM 40 Good Hangar Fenceline - N Corner 12/09/2024 8 AM 29 Good Hangar Fenceline - NE Corner 12/09/2024 8 AM 39 Good Hangar Fenceline - NE Side 12/09/2024 8 AM 35 Good Hangar Fenceline - S Corner 12/09/2024 8 AM 32 Good Hangar Fenceline - S Side 12/09/2024 8 AM 37 Good Hangar Fenceline - SW Corner 12/09/2024 8 AM 45 Good Hangar Fenceline - SW Side 12/09/2024 8 AM 30 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/09/2024 8 AM Particulate Matter 35 Level of Concern Good Legacy Road 12/09/2024 8 AM 33 Good Moffett and Tustin Ranch 12/09/2024 8 AM 17 Good Valencia and Armstrong 12/09/2024 8 AM 58 Moderate Valencia and Columbus Square 12/09/2024 8 AM 44 Good Valencia and Legacy 12/09/2024 8 AM 29 Good Victory and Tustin Ranch Rd. 12/09/2024 8 AM 31 Good Warner Avenue 12/09/2024 8 AM 35 Good Warner and Armstrong 12/09/2024 8 AM 33 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Tuesday, December 10, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/10/2024 8 AM Matter 32 Level of Concern Good Hangar Fenceline - E Side 12/10/2024 8 AM 29 Good Hangar Fenceline - N Center 12/10/2024 8 AM 29 Good Hangar Fenceline - N Corner 12/10/2024 8 AM 22 Good Hangar Fenceline - NE Corner 12/10/2024 8 AM 28 Good Hangar Fenceline - NE Side 12/10/2024 8 AM 27 Good Hangar Fenceline - S Corner 12/10/2024 8 AM ** ** Hangar Fenceline - S Side 12/10/2024 8 AM 30 Good Hangar Fenceline - SW Corner 12/10/2024 8 AM 35 Good Hangar Fenceline - SW Side 12/10/2024 8 AM ** ** • •24-Hour Hangar Fenceline - W Side Period • • 12/10/2024 8 AM Particulate Matter 25 Level of Concern Good Legacy Road 12/10/2024 8 AM 24 Good Moffett and Tustin Ranch 12/10/2024 8 AM 14 Good Valencia and Armstrong 12/10/2024 8 AM 43 Good Valencia and Columbus Square 12/10/2024 8 AM 31 Good Valencia and Legacy 12/10/2024 8 AM 20 Good Victory and Tustin Ranch Rd. 12/10/2024 8 AM 24 Good Warner Avenue 12/10/2024 8 AM 28 Good Warner and Armstrong 12/10/2024 8 AM 66 Moderate Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Wednesday, December 11, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/11/2024 8 AM Matter ** Level of Concern ** Hangar Fenceline - E Side 12/11/2024 8 AM 13 Good Hangar Fenceline - N Center 12/11/2024 8 AM 14 Good Hangar Fenceline - N Corner 12/11/2024 8 AM 9 Good Hangar Fenceline - NE Corner 12/11/2024 8 AM 12 Good Hangar Fenceline - NE Side 12/11/2024 8 AM 14 Good Hangar Fenceline - S Corner 12/11/2024 8 AM 9 Good Hangar Fenceline - S Side 12/11/2024 8 AM 14 Good Hangar Fenceline - SW Corner 12/11/2024 8 AM 20 Good Hangar Fenceline - SW Side 12/11/2024 8 AM 8 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/11/2024 8 AM Particulate Matter 8 Level of Concern Good Legacy Road 12/11/2024 8 AM 10 Good Moffett and Tustin Ranch 12/11/2024 8 AM 6 Good Valencia and Armstrong 12/11/2024 8 AM 18 Good Valencia and Columbus Square 12/11/2024 8 AM ** ** Valencia and Legacy 12/11/2024 8 AM 5 Good Victory and Tustin Ranch Rd. 12/11/2024 8 AM 7 Good Warner Avenue 12/11/2024 8 AM 11 Good Warner and Armstrong 12/11/2024 8 AM 66 Moderate Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Thursday, December 12, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/12/2024 8 AM Matter 22 Level of Concern Good Hangar Fenceline - E Side 12/12/2024 8 AM 24 Good Hangar Fenceline - N Center 12/12/2024 8 AM 24 Good Hangar Fenceline - N Corner 12/12/2024 8 AM 19 Good Hangar Fenceline - NE Corner 12/12/2024 8 AM 23 Good Hangar Fenceline - NE Side 12/12/2024 8 AM 2S Good Hangar Fenceline - S Corner 12/12/2024 8 AM 18 Good Hangar Fenceline - S Side 12/12/2024 8 AM 24 Good Hangar Fenceline - SW Corner 12/12/2024 8 AM 32 Good Hangar Fenceline - SW Side 12/12/2024 8 AM 19 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/12/2024 8 AM Particulate Matter 18 Level of Concern Good Legacy Road 12/12/2024 8 AM 18 Good Moffett and Tustin Ranch 12/12/2024 8 AM 10 Good Valencia and Armstrong 12/12/2024 8 AM 39 Good Valencia and Columbus Square 12/12/2024 8 AM 24 Good Valencia and Legacy 12/12/2024 8 AM 14 Good Victory and Tustin Ranch Rd. 12/12/2024 8 AM 18 Good Warner Avenue 12/12/2024 8 AM 22 Good Warner and Armstrong 12/12/2024 8 AM ** ** Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Friday, December 13, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/13/2024 8 AM Matter 16 Level of Concern Good Hangar Fenceline - E Side 12/13/2024 8 AM 17 Good Hangar Fenceline - N Center 12/13/2024 8 AM 23 Good Hangar Fenceline - N Corner 12/13/2024 8 AM ** ** Hangar Fenceline - NE Corner 12/13/2024 8 AM 16 Good Hangar Fenceline - NE Side 12/13/2024 8 AM 15 Good Hangar Fenceline - S Corner 12/13/2024 8 AM 14 Good Hangar Fenceline - S Side 12/13/2024 8 AM 16 Good Hangar Fenceline - SW Corner 12/13/2024 8 AM 21 Good Hangar Fenceline - SW Side 12/13/2024 8 AM 14 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/13/2024 8 AM Particulate Matter 16 Level of Concern Good Legacy Road 12/13/2024 8 AM 14 Good Moffett and Tustin Ranch 12/13/2024 8 AM ** ** Valencia and Armstrong 12/13/2024 8 AM 23 Good Valencia and Columbus Square 12/13/2024 8 AM 16 Good Valencia and Legacy 12/13/2024 8 AM 10 Good Victory and Tustin Ranch Rd. 12/13/2024 8 AM 12 Good Warner Avenue 12/13/2024 8 AM 14 Good Warner and Armstrong 12/13/2024 8 AM 14 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Saturday, December 14, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/14/2024 8 AM Matter 24 Level of Concern Good Hangar Fenceline - E Side 12/14/2024 8 AM 21 Good Hangar Fenceline - N Center 12/14/2024 8 AM 23 Good Hangar Fenceline - N Corner 12/14/2024 8 AM ** ** Hangar Fenceline - NE Corner 12/14/2024 8 AM 21 Good Hangar Fenceline - NE Side 12/14/2024 8 AM 27 Good Hangar Fenceline - S Corner 12/14/2024 8 AM 15 Good Hangar Fenceline - S Side 12/14/2024 8 AM 19 Good Hangar Fenceline - SW Corner 12/14/2024 8 AM 23 Good Hangar Fenceline - SW Side 12/14/2024 8 AM ** ** • •24-Hour Hangar Fenceline - W Side Period • • 12/14/2024 8 AM Particulate Matter 18 Level of Concern Good Legacy Road 12/14/2024 8 AM 18 Good Moffett and Tustin Ranch 12/14/2024 8 AM 7 Good Valencia and Armstrong 12/14/2024 8 AM 28 Good Valencia and Columbus Square 12/14/2024 8 AM 20 Good Valencia and Legacy 12/14/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 12/14/2024 8 AM 15 Good Warner Avenue 12/14/2024 8 AM ** ** Warner and Armstrong 12/14/2024 8 AM 20 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Sunday, December 15, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/15/2024 8 AM Matter 18 Level of Concern Good Hangar Fenceline - E Side 12/15/2024 8 AM 20 Good Hangar Fenceline - N Center 12/15/2024 8 AM 21 Good Hangar Fenceline - N Corner 12/15/2024 8 AM 15 Good Hangar Fenceline - NE Corner 12/15/2024 8 AM 20 Good Hangar Fenceline - NE Side 12/15/2024 8 AM 23 Good Hangar Fenceline - S Corner 12/15/2024 8 AM 15 Good Hangar Fenceline - S Side 12/15/2024 8 AM 20 Good Hangar Fenceline - SW Corner 12/15/2024 8 AM 21 Good Hangar Fenceline - SW Side 12/15/2024 8 AM 14 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/15/2024 8 AM Particulate Matter 17 Level of Concern Good Legacy Road 12/15/2024 8 AM 16 Good Moffett and Tustin Ranch 12/15/2024 8 AM ** ** Valencia and Armstrong 12/15/2024 8 AM 30 Good Valencia and Columbus Square 12/15/2024 8 AM 24 Good Valencia and Legacy 12/15/2024 8 AM 12 Good Victory and Tustin Ranch Rd. 12/15/2024 8 AM 16 Good Warner Avenue 12/15/2024 8 AM 18 Good Warner and Armstrong 12/15/2024 8 AM 17 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Monday, December 16, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/16/2024 8 AM Matter 29 Level of Concern Good Hangar Fenceline - E Side 12/16/2024 8 AM 26 Good Hangar Fenceline - N Center 12/16/2024 8 AM 28 Good Hangar Fenceline - N Corner 12/16/2024 8 AM 21 Good Hangar Fenceline - NE Corner 12/16/2024 8 AM 27 Good Hangar Fenceline - NE Side 12/16/2024 8 AM 2S Good Hangar Fenceline - S Corner 12/16/2024 8 AM 22 Good Hangar Fenceline - S Side 12/16/2024 8 AM 23 Good Hangar Fenceline - SW Corner 12/16/2024 8 AM 31 Good Hangar Fenceline - SW Side 12/16/2024 8 AM 23 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/16/2024 8 AM Particulate Matter 23 Level of Concern Good Legacy Road 12/16/2024 8 AM 24 Good Moffett and Tustin Ranch 12/16/2024 8 AM ** ** Valencia and Armstrong 12/16/2024 8 AM 29 Good Valencia and Columbus Square 12/16/2024 8 AM 28 Good Valencia and Legacy 12/16/2024 8 AM 17 Good Victory and Tustin Ranch Rd. 12/16/2024 8 AM ** ** Warner Avenue 12/16/2024 8 AM 26 Good Warner and Armstrong 12/16/2024 8 AM 26 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Tuesday, December 17, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/17/2024 8 AM Matter 21 Level of Concern Good Hangar Fenceline - E Side 12/17/2024 8 AM 23 Good Hangar Fenceline - N Center 12/17/2024 8 AM 23 Good Hangar Fenceline - N Corner 12/17/2024 8 AM 18 Good Hangar Fenceline - NE Corner 12/17/2024 8 AM ** ** Hangar Fenceline - NE Side 12/17/2024 8 AM 20 Good Hangar Fenceline - S Corner 12/17/2024 8 AM ** ** Hangar Fenceline - S Side 12/17/2024 8 AM 20 Good Hangar Fenceline - SW Corner 12/17/2024 8 AM 27 Good Hangar Fenceline - SW Side 12/17/2024 8 AM 18 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/17/2024 8 AM Particulate Matter ** Level of Concern ** Legacy Road 12/17/2024 8 AM 19 Good Moffett and Tustin Ranch 12/17/2024 8 AM 8 Good Valencia and Armstrong 12/17/2024 8 AM 32 Good Valencia and Columbus Square 12/17/2024 8 AM 24 Good Valencia and Legacy 12/17/2024 8 AM 15 Good Victory and Tustin Ranch Rd. 12/17/2024 8 AM 20 Good Warner Avenue 12/17/2024 8 AM 20 Good Warner and Armstrong 12/17/2024 8 AM 20 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Wednesday, December 18, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/18/2024 8 AM Matter 30 Level of Concern Good Hangar Fenceline - E Side 12/18/2024 8 AM 19 Good Hangar Fenceline - N Center 12/18/2024 8 AM 19 Good Hangar Fenceline - N Corner 12/18/2024 8 AM 15 Good Hangar Fenceline - NE Corner 12/18/2024 8 AM ** ** Hangar Fenceline - NE Side 12/18/2024 8 AM 27 Good Hangar Fenceline - S Corner 12/18/2024 8 AM 16 Good Hangar Fenceline - S Side 12/18/2024 8 AM 16 Good Hangar Fenceline - SW Corner 12/18/2024 8 AM 22 Good Hangar Fenceline - SW Side 12/18/2024 8 AM ** ** • •24-Hour Hangar Fenceline - W Side Period • • 12/18/2024 8 AM Particulate Matter ** Level of Concern ** Legacy Road 12/18/2024 8 AM 15 Good Moffett and Tustin Ranch 12/18/2024 8 AM 7 Good Valencia and Armstrong 12/18/2024 8 AM 27 Good Valencia and Columbus Square 12/18/2024 8 AM 18 Good Valencia and Legacy 12/18/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 12/18/2024 8 AM 14 Good Warner Avenue 12/18/2024 8 AM 9 Good Warner and Armstrong 12/18/2024 8 AM 18 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Thursday, December 19, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/19/2024 8 AM Matter 30 Level of Concern Good Hangar Fenceline - E Side 12/19/2024 8 AM 19 Good Hangar Fenceline - N Center 12/19/2024 8 AM 19 Good Hangar Fenceline - N Corner 12/19/2024 8 AM 15 Good Hangar Fenceline - NE Corner 12/19/2024 8 AM 18 Good Hangar Fenceline - NE Side 12/19/2024 8 AM 27 Good Hangar Fenceline - S Corner 12/19/2024 8 AM 16 Good Hangar Fenceline - S Side 12/19/2024 8 AM 16 Good Hangar Fenceline - SW Corner 12/19/2024 8 AM 22 Good Hangar Fenceline - SW Side 12/19/2024 8 AM 15 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/19/2024 8 AM Particulate Matter 14 Level of Concern Good Legacy Road 12/19/2024 8 AM 15 Good Moffett and Tustin Ranch 12/19/2024 8 AM 7 Good Valencia and Armstrong 12/19/2024 8 AM 27 Good Valencia and Columbus Square 12/19/2024 8 AM 18 Good Valencia and Legacy 12/19/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 12/19/2024 8 AM 14 Good Warner Avenue 12/19/2024 8 AM ** ** Warner and Armstrong 12/19/2024 8 AM 18 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Friday, December 20, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/20/2024 8 AM Matter 58 Level of Concern Moderate Hangar Fenceline - E Side 12/20/2024 8 AM 41 Good Hangar Fenceline - N Center 12/20/2024 8 AM 4S Good Hangar Fenceline - N Corner 12/20/2024 8 AM 27 Good Hangar Fenceline - NE Corner 12/20/2024 8 AM 41 Good Hangar Fenceline - NE Side 12/20/2024 8 AM 49 Good Hangar Fenceline - S Corner 12/20/2024 8 AM 31 Good Hangar Fenceline - S Side 12/20/2024 8 AM 26 Good Hangar Fenceline - SW Corner 12/20/2024 8 AM 43 Good Hangar Fenceline - SW Side 12/20/2024 8 AM 36 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/20/2024 8 AM Particulate Matter 36 Level of Concern Good Legacy Road 12/20/2024 8 AM 34 Good Moffett and Tustin Ranch 12/20/2024 8 AM ** ** Valencia and Armstrong 12/20/2024 8 AM 47 Good Valencia and Columbus Square 12/20/2024 8 AM 44 Good Valencia and Legacy 12/20/2024 8 AM 21 Good Victory and Tustin Ranch Rd. 12/20/2024 8 AM 24 Good Warner Avenue 12/20/2024 8 AM 37 Good Warner and Armstrong 12/20/2024 8 AM 27 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Saturday, December 21, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/21/2024 8 AM Matter 98 Level of Concern Moderate Hangar Fenceline - E Side 12/21/2024 8 AM 69 Moderate Hangar Fenceline - N Center 12/21/2024 8 AM 86 Moderate Hangar Fenceline - N Corner 12/21/2024 8 AM 43 Good Hangar Fenceline - NE Corner 12/21/2024 8 AM 70 Moderate Hangar Fenceline - NE Side 12/21/2024 8 AM 57 Moderate Hangar Fenceline - S Corner 12/21/2024 8 AM 46 Good Hangar Fenceline - S Side 12/21/2024 8 AM 47 Good Hangar Fenceline - SW Corner 12/21/2024 8 AM 63 Moderate Hangar Fenceline - SW Side 12/21/2024 8 AM 66 Moderate • •24-Hour Hangar Fenceline - W Side Period • • 12/21/2024 8 AM Particulate Matter 57 Level of Concern Moderate Legacy Road 12/21/2024 8 AM 61 Moderate Moffett and Tustin Ranch 12/21/2024 8 AM 15 Good Valencia and Armstrong 12/21/2024 8 AM 72 Moderate Valencia and Columbus Square 12/21/2024 8 AM 73 Moderate Valencia and Legacy 12/21/2024 8 AM 33 Good Victory and Tustin Ranch Rd. 12/21/2024 8 AM 51 Moderate Warner Avenue 12/21/2024 8 AM 64 Moderate Warner and Armstrong 12/21/2024 8 AM 58 Moderate Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Sunday, December 22, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/22/2024 8 AM Matter 74 Level of Concern Moderate Hangar Fenceline - E Side 12/22/2024 8 AM 45 Good Hangar Fenceline - N Center 12/22/2024 8 AM 48 Good Hangar Fenceline - N Corner 12/22/2024 8 AM 35 Good Hangar Fenceline - NE Corner 12/22/2024 8 AM 47 Good Hangar Fenceline - NE Side 12/22/2024 8 AM 46 Good Hangar Fenceline - S Corner 12/22/2024 8 AM 35 Good Hangar Fenceline - S Side 12/22/2024 8 AM 39 Good Hangar Fenceline - SW Corner 12/22/2024 8 AM 51 Good Hangar Fenceline - SW Side 12/22/2024 8 AM 42 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/22/2024 8 AM Particulate Matter 38 Level of Concern Good Legacy Road 12/22/2024 8 AM 43 Good Moffett and Tustin Ranch 12/22/2024 8 AM 12 Good Valencia and Armstrong 12/22/2024 8 AM 55 Moderate Valencia and Columbus Square 12/22/2024 8 AM 49 Good Valencia and Legacy 12/22/2024 8 AM 31 Good Victory and Tustin Ranch Rd. 12/22/2024 8 AM ** ** Warner Avenue 12/22/2024 8 AM 45 Good Warner and Armstrong 12/22/2024 8 AM 45 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Monday, December 23, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/23/2024 8 AM Matter 61 Level of Concern Moderate Hangar Fenceline - E Side 12/23/2024 8 AM 34 Good Hangar Fenceline - N Center 12/23/2024 8 AM 36 Good Hangar Fenceline - N Corner 12/23/2024 8 AM 25 Good Hangar Fenceline - NE Corner 12/23/2024 8 AM 35 Good Hangar Fenceline - NE Side 12/23/2024 8 AM ** ** Hangar Fenceline - S Corner 12/23/2024 8 AM 26 Good Hangar Fenceline - S Side 12/23/2024 8 AM 30 Good Hangar Fenceline - SW Corner 12/23/2024 8 AM 41 Good Hangar Fenceline - SW Side 12/23/2024 8 AM 27 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/23/2024 8 AM Particulate Matter 28 Level of Concern Good Legacy Road 12/23/2024 8 AM 30 Good Moffett and Tustin Ranch 12/23/2024 8 AM ** ** Valencia and Armstrong 12/23/2024 8 AM 41 Good Valencia and Columbus Square 12/23/2024 8 AM 38 Good Valencia and Legacy 12/23/2024 8 AM 22 Good Victory and Tustin Ranch Rd. 12/23/2024 8 AM 19 Good Warner Avenue 12/23/2024 8 AM 31 Good Warner and Armstrong 12/23/2024 8 AM 30 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Tuesday, December 24, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/24/2024 8 AM Matter 87 Level of Concern Moderate Hangar Fenceline - E Side 12/24/2024 8 AM 55 Moderate Hangar Fenceline - N Center 12/24/2024 8 AM 56 Moderate Hangar Fenceline - N Corner 12/24/2024 8 AM 35 Good Hangar Fenceline - NE Corner 12/24/2024 8 AM 55 Moderate Hangar Fenceline - NE Side 12/24/2024 8 AM 52 Good Hangar Fenceline - S Corner 12/24/2024 8 AM 35 Good Hangar Fenceline - S Side 12/24/2024 8 AM 38 Good Hangar Fenceline - SW Corner 12/24/2024 8 AM 51 Good Hangar Fenceline - SW Side 12/24/2024 8 AM 51 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/24/2024 8 AM Particulate Matter 45 Level of Concern Good Legacy Road 12/24/2024 8 AM 44 Good Moffett and Tustin Ranch 12/24/2024 8 AM ** ** Valencia and Armstrong 12/24/2024 8 AM 58 Moderate Valencia and Columbus Square 12/24/2024 8 AM 58 Moderate Valencia and Legacy 12/24/2024 8 AM 25 Good Victory and Tustin Ranch Rd. 12/24/2024 8 AM 30 Good Warner Avenue 12/24/2024 8 AM 49 Good Warner and Armstrong 12/24/2024 8 AM 38 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Wednesday, December 25, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/25/2024 8 AM Matter 61 Level of Concern Moderate Hangar Fenceline - E Side 12/25/2024 8 AM ** ** Hangar Fenceline - N Center 12/25/2024 8 AM 28 Good Hangar Fenceline - N Corner 12/25/2024 8 AM 19 Good Hangar Fenceline - NE Corner 12/25/2024 8 AM 26 Good Hangar Fenceline - NE Side 12/25/2024 8 AM 24 Good Hangar Fenceline - S Corner 12/25/2024 8 AM 18 Good Hangar Fenceline - S Side 12/25/2024 8 AM 26 Good Hangar Fenceline - SW Corner 12/25/2024 8 AM 27 Good Hangar Fenceline - SW Side 12/25/2024 8 AM 24 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/25/2024 8 AM Particulate Matter 22 Level of Concern Good Legacy Road 12/25/2024 8 AM 23 Good Moffett and Tustin Ranch 12/25/2024 8 AM ** ** Valencia and Armstrong 12/25/2024 8 AM 28 Good Valencia and Columbus Square 12/25/2024 8 AM 29 Good Valencia and Legacy 12/25/2024 8 AM 15 Good Victory and Tustin Ranch Rd. 12/25/2024 8 AM 18 Good Warner Avenue 12/25/2024 8 AM 24 Good Warner and Armstrong 12/25/2024 8 AM 23 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Thursday, December 26, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/26/2024 8 AM Matter 43 Level of Concern Good Hangar Fenceline - E Side 12/26/2024 8 AM 16 Good Hangar Fenceline - N Center 12/26/2024 8 AM ** ** Hangar Fenceline - N Corner 12/26/2024 8 AM 12 Good Hangar Fenceline - NE Corner 12/26/2024 8 AM 16 Good Hangar Fenceline - NE Side 12/26/2024 8 AM 24 Good Hangar Fenceline - S Corner 12/26/2024 8 AM ** ** Hangar Fenceline - S Side 12/26/2024 8 AM 14 Good Hangar Fenceline - SW Corner 12/26/2024 8 AM 17 Good Hangar Fenceline - SW Side 12/26/2024 8 AM 13 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/26/2024 8 AM Particulate Matter ** Level of Concern ** Legacy Road 12/26/2024 8 AM 13 Good Moffett and Tustin Ranch 12/26/2024 8 AM ** ** Valencia and Armstrong 12/26/2024 8 AM 22 Good Valencia and Columbus Square 12/26/2024 8 AM 16 Good Valencia and Legacy 12/26/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 12/26/2024 8 AM 14 Good Warner Avenue 12/26/2024 8 AM 13 Good Warner and Armstrong 12/26/2024 8 AM 13 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Friday, December 27, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/27/2024 8 AM Matter 48 Level of Concern Good Hangar Fenceline - E Side 12/27/2024 8 AM 16 Good Hangar Fenceline - N Center 12/27/2024 8 AM 18 Good Hangar Fenceline - N Corner 12/27/2024 8 AM ** ** Hangar Fenceline - NE Corner 12/27/2024 8 AM 16 Good Hangar Fenceline - NE Side 12/27/2024 8 AM 29 Good Hangar Fenceline - S Corner 12/27/2024 8 AM 12 Good Hangar Fenceline - S Side 12/27/2024 8 AM 15 Good Hangar Fenceline - SW Corner 12/27/2024 8 AM 16 Good Hangar Fenceline - SW Side 12/27/2024 8 AM 12 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/27/2024 8 AM Particulate Matter ** Level of Concern ** Legacy Road 12/27/2024 8 AM ** ** Moffett and Tustin Ranch 12/27/2024 8 AM 15 Good Valencia and Armstrong 12/27/2024 8 AM 21 Good Valencia and Columbus Square 12/27/2024 8 AM 17 Good Valencia and Legacy 12/27/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 12/27/2024 8 AM ** ** Warner Avenue 12/27/2024 8 AM 14 Good Warner and Armstrong 12/27/2024 8 AM 15 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Saturday, December 28, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/28/2024 8 AM Matter 53 Level of Concern Good Hangar Fenceline - E Side 12/28/2024 8 AM 19 Good Hangar Fenceline - N Center 12/28/2024 8 AM 21 Good Hangar Fenceline - N Corner 12/28/2024 8 AM 13 Good Hangar Fenceline - NE Corner 12/28/2024 8 AM 19 Good Hangar Fenceline - NE Side 12/28/2024 8 AM 26 Good Hangar Fenceline - S Corner 12/28/2024 8 AM ** ** Hangar Fenceline - S Side 12/28/2024 8 AM 16 Good Hangar Fenceline - SW Corner 12/28/2024 8 AM 19 Good Hangar Fenceline - SW Side 12/28/2024 8 AM 15 Good • •24-Hour Hangar Fenceline - W Side Period • • 12/28/2024 8 AM Particulate Matter 16 Level of Concern Good Legacy Road 12/28/2024 8 AM 18 Good Moffett and Tustin Ranch 12/28/2024 8 AM 16 Good Valencia and Armstrong 12/28/2024 8 AM 21 Good Valencia and Columbus Square 12/28/2024 8 AM 20 Good Valencia and Legacy 12/28/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 12/28/2024 8 AM 15 Good Warner Avenue 12/28/2024 8 AM 17 Good Warner and Armstrong 12/28/2024 8 AM 16 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Sunday, December 29, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/29/2024 8 AM Matter 107 Level of Concern Moderate Hangar Fenceline - E Side 12/29/2024 8 AM 65 Moderate Hangar Fenceline - N Center 12/29/2024 8 AM 66 Moderate Hangar Fenceline - N Corner 12/29/2024 8 AM 46 Good Hangar Fenceline - NE Corner 12/29/2024 8 AM 66 Moderate Hangar Fenceline - NE Side 12/29/2024 8 AM 56 Moderate Hangar Fenceline - S Corner 12/29/2024 8 AM ** ** Hangar Fenceline - S Side 12/29/2024 8 AM 55 Moderate Hangar Fenceline - SW Corner 12/29/2024 8 AM 69 Moderate Hangar Fenceline - SW Side 12/29/2024 8 AM 58 Moderate • •24-Hour Hangar Fenceline - W Side Period • • 12/29/2024 8 AM Particulate Matter 52 Level of Concern Good Legacy Road 12/29/2024 8 AM 62 Moderate Moffett and Tustin Ranch 12/29/2024 8 AM 55 Moderate Valencia and Armstrong 12/29/2024 8 AM 63 Moderate Valencia and Columbus Square 12/29/2024 8 AM 68 Moderate Valencia and Legacy 12/29/2024 8 AM ** ** Victory and Tustin Ranch Rd. 12/29/2024 8 AM 47 Good Warner Avenue 12/29/2024 8 AM 57 Moderate Warner and Armstrong 12/29/2024 8 AM 51 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Monday, December 30, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/30/2024 8 AM Matter 88 Level of Concern Moderate Hangar Fenceline - E Side 12/30/2024 8 AM 95 Moderate Hangar Fenceline - N Center 12/30/2024 8 AM 94 Moderate Hangar Fenceline - N Corner 12/30/2024 8 AM 70 Moderate Hangar Fenceline - NE Corner 12/30/2024 8 AM 96 Moderate Hangar Fenceline - NE Side 12/30/2024 8 AM 78 Moderate Hangar Fenceline - S Corner 12/30/2024 8 AM 75 Moderate Hangar Fenceline - S Side 12/30/2024 8 AM 87 Moderate Hangar Fenceline - SW Corner 12/30/2024 8 AM 117 Moderate Hangar Fenceline - SW Side 12/30/2024 8 AM 85 Moderate • •24-Hour Hangar Fenceline - W Side Period • • 12/30/2024 8 AM Particulate Matter ** Level of Concern ** Legacy Road 12/30/2024 8 AM 91 Moderate Moffett and Tustin Ranch 12/30/2024 8 AM 81 Moderate Valencia and Armstrong 12/30/2024 8 AM 99 Moderate Valencia and Columbus Square 12/30/2024 8 AM 99 Moderate Valencia and Legacy 12/30/2024 8 AM 60 Moderate Victory and Tustin Ranch Rd. 12/30/2024 8 AM 75 Moderate Warner Avenue 12/30/2024 8 AM 85 Moderate Warner and Armstrong 12/30/2024 8 AM 82 Moderate Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Tuesday, December 31, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 12/31/2024 8 AM Matter 45 Level of Concern Good Hangar Fenceline - E Side 12/31/2024 8 AM 49 Good Hangar Fenceline - N Center 12/31/2024 8 AM 51 Good Hangar Fenceline - N Corner 12/31/2024 8 AM 36 Good Hangar Fenceline - NE Corner 12/31/2024 8 AM 51 Good Hangar Fenceline - NE Side 12/31/2024 8 AM 45 Good Hangar Fenceline - S Corner 12/31/2024 8 AM 39 Good Hangar Fenceline - S Side 12/31/2024 8 AM 44 Good Hangar Fenceline - SW Corner 12/31/2024 8 AM 66 Moderate Hangar Fenceline - SW Side 12/31/2024 8 AM ** ** • •24-Hour Hangar Fenceline - W Side Period • • 12/31/2024 8 AM Particulate Matter 39 Level of Concern Good Legacy Road 12/31/2024 8 AM 48 Good Moffett and Tustin Ranch 12/31/2024 8 AM 41 Good Valencia and Armstrong 12/31/2024 8 AM 54 Good Valencia and Columbus Square 12/31/2024 8 AM 53 Good Valencia and Legacy 12/31/2024 8 AM 29 Good Victory and Tustin Ranch Rd. 12/31/2024 8 AM 36 Good Warner Avenue 12/31/2024 8 AM 43 Good Warner and Armstrong 12/31/2024 8 AM ** ** Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected.