Initial Ozone Exceedance Analysis for July 29, 2026

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• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

• Wildfire: Keller Fire
  Acres Burned: 10.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 1:22 p.m.
  
• Wildfire: Fish Fire
  Acres Burned: 4201.00
  Date Created: July 27, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 5:40 p.m.
  
• Wildfire: Tin Fire
  Acres Burned: 37.00
  Date Created: July 26, 2026
  Date extinguished: July 27, 2026
  Date Last Updated: July 27, 2026, 12:45 a.m.
  
• Wildfire: Green Fire
  Acres Burned: 55.00
  Date Created: July 28, 2026
  Date extinguished: None
  Date Last Updated: July 30, 2026, 8:58 p.m.
  

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Riverside - Rubidoux. 3 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 11.0 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 29.3 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 23.4 miles away. No prescribed fires were identified within 50 miles of Riverside - Rubidoux.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 173 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Mira Loma - Van Buren. 3 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 10.6 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 31.5 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 27.7 miles away. No prescribed fires were identified within 50 miles of Mira Loma - Van Buren.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 173 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Glendora - Laurel. 4 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 30.3 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 52.8 miles away. Fish Fire, which burned 4201.00, started on July 27, 2026, and last updated on July 29, 2026. It was located 92.6 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 47.4 miles away. No prescribed fires were identified within 50 miles of Glendora - Laurel.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 3799 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Pasadena. 4 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 42.9 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 65.0 miles away. Fish Fire, which burned 4201.00, started on July 27, 2026, and last updated on July 29, 2026. It was located 86.5 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 63.1 miles away. No prescribed fires were identified within 50 miles of Pasadena.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 3799 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Crestline - Lake Gregory. 3 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 29.6 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 43.0 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 17.3 miles away. No prescribed fires were identified within 50 miles of Crestline - Lake Gregory.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 192 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Victorville - Park Avenue. 4 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 46.7 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 61.7 miles away. Fish Fire, which burned 4201.00, started on July 27, 2026, and last updated on July 29, 2026. It was located 93.7 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 33.2 miles away. No prescribed fires were identified within 50 miles of Victorville - Park Avenue.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 3795 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Hesperia - Olive Street. 4 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 40.8 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 54.9 miles away. Fish Fire, which burned 4201.00, started on July 27, 2026, and last updated on July 29, 2026. It was located 99.5 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 26.5 miles away. No prescribed fires were identified within 50 miles of Hesperia - Olive Street.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 2656 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at San Bernadino - 4th Street. 3 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 21.1 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 33.7 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 14.3 miles away. No prescribed fires were identified within 50 miles of San Bernadino - 4th Street.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 192 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.

On July 29, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Redlands - Dearborn. 3 wildfires were detected within 100 miles of the site from two days before the event to the event day. The proximity of these fires to the site suggests they may have contributed to elevated ozone levels on this date. The following wildfires were identified: Tin Fire, which burned 37.00, started on July 26, 2026, and ended on July 27, 2026. It was located 23.4 miles away. Keller Fire, which burned 10.00, started on July 26, 2026, and ended on July 27, 2026. It was located 29.9 miles away. Green Fire, which burned 55.00, started on July 28, 2026, and last updated on July 29, 2026. It was located 7.5 miles away. No prescribed fires were identified within 50 miles of Redlands - Dearborn.

In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 211 fire hotspots over the past two days (from two days before the event to the current day) within 100 miles of the site. This indicates ongoing fire activity in the region, which may have contributed to the observed air quality conditions. Satellite data confirms the presence of smoke plumes over the monitoring site, suggesting that emissions from nearby fires were transported into the area, potentially impacting ozone levels.