Initial Ozone Exceedance Analysis for May 7, 2026

Monitors Exceeding Ozone Concentration of 70 ppb

Monitor AQS ID	Site Name	Location (Lat, Long)	Ozone Value	AQI Category
060290007	Edison	35.35, -118.85	72.0	Sensitive Group
060658001	Riverside - Rubidoux	34.00, -117.42	74.0	Sensitive Group
060650012	Banning - South Hathaway Street	33.92, -116.86	75.0	Sensitive Group
060658005	Mira Loma - Van Buren	34.00, -117.49	72.0	Sensitive Group
060659001	Lake Elsinore - W. Flint Street	33.68, -117.33	71.0	Sensitive Group
060714003	Redlands - Dearborn	34.06, -117.15	78.0	Sensitive Group
060719004	San Bernadino - 4th Street	34.11, -117.27	71.0	Sensitive Group
840060655002	Palm Springs	33.85, -116.52	70.0	Moderate

Air Quality Analysis

Monitor AQS ID	Air Quality Analysis
060290007	Hourly Ozone Analysis At Edison, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 4 occasions, occurring at: May 07, 12:00 PM, May 07, 01:00 PM, May 07, 02:00 PM, May 07, 03:00 PM. Among these exceedances, 1 were significant pollution spikes (peaks), recorded at: May 07, 01:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 79.0 ppb at May 07, 01:00 PM, while the lowest was 20.0 ppb at May 08, 05:00 AM. Unusual ozone spikes detected at: May 07, 01:00 PM, May 07, 02:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Edison exceeded 70 ppb on 5 days, which accounts for 1.4% of the year. On May 07, 2026, the ozone concentration reached 72.0 ppb, ranking #4 among exceedance events this year. The highest ozone exceedance this year was 73.0 ppb on March 19, 2026, which was 1.0 ppb higher than this event. The majority of exceedance events occurred in March, with 4 occurrences. The season with the highest exceedance frequency was Spring, accounting for 5 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Edison exceeded the 70 ppb daily standard most frequently during Spring, accounting for 28.7% of all exceedances. The month with the highest number of exceedances was March, making up 10.6% of the total. The exceedance recorded on May 07, 2026 at Edison reached 72.0 ppb, which is 19.7 ppb higher than the average Spring ozone level of 52.3 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
060658001	Hourly Ozone Analysis At Riverside - Rubidoux, hourly ozone concentrations showed a decreasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 6 occasions, occurring at: May 07, 12:00 PM, May 07, 01:00 PM, May 08, 12:00 PM, May 08, 01:00 PM, May 08, 02:00 PM, May 08, 03:00 PM. Among these exceedances, 1 were significant pollution spikes (peaks), recorded at: May 08, 01:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 98.0 ppb at May 07, 12:00 PM, while the lowest was 2.0 ppb at May 07, 03:00 AM. Unusual ozone spikes detected at: May 07, 12:00 PM, May 07, 01:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Riverside - Rubidoux exceeded 70 ppb on 16 days, which accounts for 4.4% of the year. On May 07, 2026, the ozone concentration reached 74.0 ppb, ranking #10 among exceedance events this year. The highest ozone exceedance this year was 101.0 ppb on March 20, 2026, which was 27.0 ppb higher than this event. The majority of exceedance events occurred in March, with 11 occurrences. The season with the highest exceedance frequency was Spring, accounting for 16 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Riverside - Rubidoux exceeded the 70 ppb daily standard most frequently during Spring, accounting for 27.6% of all exceedances. The month with the highest number of exceedances was January, making up 9.9% of the total. The exceedance recorded on May 07, 2026 at Riverside - Rubidoux reached 74.0 ppb, which is 19.2 ppb higher than the average Spring ozone level of 54.8 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
060650012	Hourly Ozone Analysis At Banning - South Hathaway Street, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 7 occasions, occurring at: May 07, 11:00 AM, May 07, 12:00 PM, May 07, 01:00 PM, May 07, 02:00 PM, May 07, 03:00 PM, May 07, 04:00 PM, May 07, 05:00 PM. Among these exceedances, 2 were significant pollution spikes (peaks), recorded at: May 07, 01:00 PM, May 07, 03:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 81.0 ppb at May 07, 03:00 PM, while the lowest was 14.0 ppb at May 07, 02:00 AM. Unusual ozone spikes detected at: May 07, 03:00 PM, May 07, 04:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Banning - South Hathaway Street exceeded 70 ppb on 9 days, which accounts for 2.5% of the year. On May 07, 2026, the ozone concentration reached 75.0 ppb, ranking #4 among exceedance events this year. The highest ozone exceedance this year was 83.0 ppb on March 18, 2026, which was 8.0 ppb higher than this event. The majority of exceedance events occurred in March, with 3 occurrences. The season with the highest exceedance frequency was Spring, accounting for 9 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Banning - South Hathaway Street exceeded the 70 ppb daily standard most frequently during Spring, accounting for 27.7% of all exceedances. The month with the highest number of exceedances was March, making up 9.9% of the total. The exceedance recorded on May 07, 2026 at Banning - South Hathaway Street reached 75.0 ppb, which is 19.0 ppb higher than the average Spring ozone level of 56.0 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
060658005	Hourly Ozone Analysis At Mira Loma - Van Buren, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 7 occasions, occurring at: May 07, 12:00 PM, May 07, 01:00 PM, May 07, 02:00 PM, May 08, 12:00 PM, May 08, 01:00 PM, May 08, 02:00 PM, May 08, 03:00 PM. Among these exceedances, 2 were significant pollution spikes (peaks), recorded at: May 07, 12:00 PM, May 08, 12:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 103.0 ppb at May 07, 12:00 PM, while the lowest was 2.0 ppb at May 07, 04:00 AM. Unusual ozone spikes detected at: May 07, 12:00 PM, May 08, 12:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Mira Loma - Van Buren exceeded 70 ppb on 16 days, which accounts for 4.4% of the year. On May 07, 2026, the ozone concentration reached 72.0 ppb, ranking #13 among exceedance events this year. The highest ozone exceedance this year was 99.0 ppb on March 20, 2026, which was 27.0 ppb higher than this event. The majority of exceedance events occurred in March, with 11 occurrences. The season with the highest exceedance frequency was Spring, accounting for 15 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Mira Loma - Van Buren exceeded the 70 ppb daily standard most frequently during Spring, accounting for 27.4% of all exceedances. The month with the highest number of exceedances was January, making up 9.7% of the total. The exceedance recorded on May 07, 2026 at Mira Loma - Van Buren reached 72.0 ppb, which is 17.7 ppb higher than the average Spring ozone level of 54.3 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
060659001	Hourly Ozone Analysis At Lake Elsinore - W. Flint Street, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 4 occasions, occurring at: May 07, 10:00 AM, May 07, 11:00 AM, May 07, 12:00 PM, May 07, 01:00 PM. Among these exceedances, 1 were significant pollution spikes (peaks), recorded at: May 07, 11:00 AM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 78.0 ppb at May 07, 11:00 AM, while the lowest was 5.0 ppb at May 07, 04:00 AM. Unusual ozone spikes detected at: May 07, 11:00 AM, May 07, 12:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Lake Elsinore - W. Flint Street exceeded 70 ppb on 3 days, which accounts for 0.8% of the year. On May 07, 2026, the ozone concentration reached 71.0 ppb, ranking #3 among exceedance events this year. The highest ozone exceedance this year was 78.0 ppb on March 19, 2026, which was 7.0 ppb higher than this event. The majority of exceedance events occurred in March, with 2 occurrences. The season with the highest exceedance frequency was Spring, accounting for 3 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Lake Elsinore - W. Flint Street exceeded the 70 ppb daily standard most frequently during Spring, accounting for 27.6% of all exceedances. The month with the highest number of exceedances was March, making up 9.9% of the total. The exceedance recorded on May 07, 2026 at Lake Elsinore - W. Flint Street reached 71.0 ppb, which is 18.9 ppb higher than the average Spring ozone level of 52.1 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
060714003	Hourly Ozone Analysis At Redlands - Dearborn, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 9 occasions, occurring at: May 07, 01:00 PM, May 07, 02:00 PM, May 07, 03:00 PM, May 07, 04:00 PM, May 07, 05:00 PM, May 08, 12:00 PM, May 08, 01:00 PM, May 08, 02:00 PM, May 08, 03:00 PM. Among these exceedances, 2 were significant pollution spikes (peaks), recorded at: May 07, 02:00 PM, May 08, 01:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 95.0 ppb at May 07, 02:00 PM, while the lowest was 7.0 ppb at May 08, 04:00 AM. Unusual ozone spikes detected at: May 07, 02:00 PM, May 07, 03:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Redlands - Dearborn exceeded 70 ppb on 16 days, which accounts for 4.4% of the year. On May 07, 2026, the ozone concentration reached 78.0 ppb, ranking #11 among exceedance events this year. The highest ozone exceedance this year was 94.0 ppb on March 20, 2026, which was 16.0 ppb higher than this event. The majority of exceedance events occurred in March, with 9 occurrences. The season with the highest exceedance frequency was Spring, accounting for 16 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Redlands - Dearborn exceeded the 70 ppb daily standard most frequently during Spring, accounting for 27.5% of all exceedances. The month with the highest number of exceedances was January, making up 9.9% of the total. The exceedance recorded on May 07, 2026 at Redlands - Dearborn reached 78.0 ppb, which is 21.3 ppb higher than the average Spring ozone level of 56.7 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
060719004	Hourly Ozone Analysis At San Bernadino - 4th Street, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 8 occasions, occurring at: May 07, 01:00 PM, May 07, 02:00 PM, May 07, 03:00 PM, May 07, 04:00 PM, May 08, 12:00 PM, May 08, 01:00 PM, May 08, 02:00 PM, May 08, 03:00 PM. Among these exceedances, 2 were significant pollution spikes (peaks), recorded at: May 07, 03:00 PM, May 08, 02:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 89.0 ppb at May 08, 02:00 PM, while the lowest was 2.0 ppb at May 07, 04:00 AM. Unusual ozone spikes detected at: May 08, 02:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at San Bernadino - 4th Street exceeded 70 ppb on 16 days, which accounts for 4.4% of the year. On May 07, 2026, the ozone concentration reached 71.0 ppb, ranking #14 among exceedance events this year. The highest ozone exceedance this year was 106.0 ppb on March 20, 2026, which was 35.0 ppb higher than this event. The majority of exceedance events occurred in March, with 12 occurrences. The season with the highest exceedance frequency was Spring, accounting for 16 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at San Bernadino - 4th Street exceeded the 70 ppb daily standard most frequently during Spring, accounting for 28.4% of all exceedances. The month with the highest number of exceedances was March, making up 10.0% of the total. The exceedance recorded on May 07, 2026 at San Bernadino - 4th Street reached 71.0 ppb, which is 14.8 ppb higher than the average Spring ozone level of 56.2 ppb. This exceedance is notable but does not rank in the top 10 highest exceedances recorded from 2022 to 2026. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.
840060655002	Hourly Ozone Analysis At Palm Springs, hourly ozone concentrations showed an increasing trend on May 07 and May 08. O3 levels exceeded 70 ppb on 5 occasions, occurring at: May 07, 02:00 PM, May 07, 03:00 PM, May 07, 04:00 PM, May 07, 05:00 PM, May 08, 03:00 PM. Among these exceedances, 1 were significant pollution spikes (peaks), recorded at: May 07, 04:00 PM. Hourly ozone levels showed a distinct day-night pattern. The highest recorded ozone concentration was 84.0 ppb at May 07, 04:00 PM, while the lowest was 35.0 ppb at May 07, 06:00 AM. Unusual ozone spikes detected at: May 07, 04:00 PM, May 07, 05:00 PM. Daily ozone Analysis of the Year Throughout 2026, ozone levels at Palm Springs exceeded 70 ppb on 4 days, which accounts for 1.1% of the year. On May 07, 2026, the ozone concentration reached 70.0 ppb, ranking #4 among exceedance events this year. The highest ozone exceedance this year was 77.0 ppb on April 29, 2026, which was 7.0 ppb higher than this event. The majority of exceedance events occurred in April, with 2 occurrences. The season with the highest exceedance frequency was Spring, accounting for 4 exceedance days. Historical daily Ozone Analysis Between 2022 and 2026, ozone levels at Palm Springs exceeded the 70 ppb daily standard most frequently during Spring, accounting for 100.0% of all exceedances. The month with the highest number of exceedances was April, making up 50.0% of the total. The exceedance recorded on May 07, 2026 at Palm Springs reached 70.0 ppb, which is 7.6 ppb higher than the average Spring ozone level of 62.4 ppb. This exceedance ranks #4 out of 14 exceedances recorded from 2022 to 2026, placing it among the top 10 highest exceedances. These exceedances are often influenced by seasonal factors such as wildfires, prescribed burns, stagnant air, temperature inversions, or increased local emissions.

Average Hourly Ozone for Days Around Event

Time series of 1-hour ozone concentrations at Edison starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at Riverside - Rubidoux starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at Banning - South Hathaway Street starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at Mira Loma - Van Buren starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at Lake Elsinore - W. Flint Street starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at Redlands - Dearborn starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at San Bernadino - 4th Street starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Time series of 1-hour ozone concentrations at Palm Springs starting on May 7, 2026. The number '1' indicates the highest 1-hour ozone concentration of the day, which is also the time used for HYSPLIT backward trajectory analysis.

Historical Daily Maximum 8-Hour Ozone Concentration

Time series plot of daily maximum 8-Hour ozone concentrations at Edison for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at Riverside - Rubidoux for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at Banning - South Hathaway Street for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at Mira Loma - Van Buren for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at Lake Elsinore - W. Flint Street for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at Redlands - Dearborn for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at San Bernadino - 4th Street for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Time series plot of daily maximum 8-Hour ozone concentrations at Palm Springs for each year between 2022 and 2026. The colored dots represent the daily maximum 8-Hour ozone concentrations on May 7, 2026. The black line indicates the 5-year average daily maximum 8-Hour ozone concentration, and the grey dashed line represents the 70 ppb daily ozone standard.

Prescribed Fires within 50 Miles

Monitor AQS ID	On the Day	One Day Before	Two Days Before
060290007	No fires	No fires	Rx: 192829708 Date: May 5, 2026 District: Eastern Kern APCD Location: 35.736, -118.556 Acres Requested: 1.0 Acres Burned: 1.0 Smoke Simulation: Bluesky Smoke Data
060658001	Rx: 192829349 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829350 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 23.2 Acres Burned: 23.2 Smoke Simulation: Bluesky Smoke Data Rx: 192830307 Date: May 7, 2026 District: South Coast AQMD Location: 33.954, -117.841 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830308 Date: May 7, 2026 District: South Coast AQMD Location: 33.975, -117.808 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829347 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.35, -117.305 Acres Requested: 10.0 Acres Burned: 10.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829348 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.346, -117.297 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829345 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.35, -117.301 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829346 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.348, -117.297 Acres Requested: 3.0 Acres Burned: 3.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830041 Date: May 5, 2026 District: South Coast AQMD Location: 33.608, -117.354 Acres Requested: 19.0 Acres Burned: 19.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830042 Date: May 5, 2026 District: South Coast AQMD Location: 33.61, -117.353 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data
060650012	Rx: 192829349 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829350 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 23.2 Acres Burned: 23.2 Smoke Simulation: Bluesky Smoke Data	Rx: 192829347 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.35, -117.305 Acres Requested: 10.0 Acres Burned: 10.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829348 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.346, -117.297 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829345 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.35, -117.301 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829346 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.348, -117.297 Acres Requested: 3.0 Acres Burned: 3.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829750 Date: May 5, 2026 District: San Diego County APCD Location: 33.386, -116.794 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830041 Date: May 5, 2026 District: South Coast AQMD Location: 33.608, -117.354 Acres Requested: 19.0 Acres Burned: 19.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830042 Date: May 5, 2026 District: South Coast AQMD Location: 33.61, -117.353 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data
060658005	Rx: 192829349 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829350 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 23.2 Acres Burned: 23.2 Smoke Simulation: Bluesky Smoke Data Rx: 192830307 Date: May 7, 2026 District: South Coast AQMD Location: 33.954, -117.841 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830308 Date: May 7, 2026 District: South Coast AQMD Location: 33.975, -117.808 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829347 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.35, -117.305 Acres Requested: 10.0 Acres Burned: 10.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829348 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.346, -117.297 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829345 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.35, -117.301 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829346 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.348, -117.297 Acres Requested: 3.0 Acres Burned: 3.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830041 Date: May 5, 2026 District: South Coast AQMD Location: 33.608, -117.354 Acres Requested: 19.0 Acres Burned: 19.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830042 Date: May 5, 2026 District: South Coast AQMD Location: 33.61, -117.353 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data
060659001	Rx: 192829349 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829350 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 23.2 Acres Burned: 23.2 Smoke Simulation: Bluesky Smoke Data Rx: 192830307 Date: May 7, 2026 District: South Coast AQMD Location: 33.954, -117.841 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830308 Date: May 7, 2026 District: South Coast AQMD Location: 33.975, -117.808 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829347 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.35, -117.305 Acres Requested: 10.0 Acres Burned: 10.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829348 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.346, -117.297 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829345 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.35, -117.301 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829346 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.348, -117.297 Acres Requested: 3.0 Acres Burned: 3.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829750 Date: May 5, 2026 District: San Diego County APCD Location: 33.386, -116.794 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830041 Date: May 5, 2026 District: South Coast AQMD Location: 33.608, -117.354 Acres Requested: 19.0 Acres Burned: 19.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830042 Date: May 5, 2026 District: South Coast AQMD Location: 33.61, -117.353 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data
060714003	Rx: 192829349 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829350 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 23.2 Acres Burned: 23.2 Smoke Simulation: Bluesky Smoke Data Rx: 192830307 Date: May 7, 2026 District: South Coast AQMD Location: 33.954, -117.841 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830308 Date: May 7, 2026 District: South Coast AQMD Location: 33.975, -117.808 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829347 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.35, -117.305 Acres Requested: 10.0 Acres Burned: 10.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829348 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.346, -117.297 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829345 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.35, -117.301 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829346 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.348, -117.297 Acres Requested: 3.0 Acres Burned: 3.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830041 Date: May 5, 2026 District: South Coast AQMD Location: 33.608, -117.354 Acres Requested: 19.0 Acres Burned: 19.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830042 Date: May 5, 2026 District: South Coast AQMD Location: 33.61, -117.353 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data
060719004	Rx: 192829349 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829350 Date: May 7, 2026 District: Mojave Desert AQMD Location: 34.348, -117.305 Acres Requested: 23.2 Acres Burned: 23.2 Smoke Simulation: Bluesky Smoke Data Rx: 192830307 Date: May 7, 2026 District: South Coast AQMD Location: 33.954, -117.841 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830308 Date: May 7, 2026 District: South Coast AQMD Location: 33.975, -117.808 Acres Requested: 0.0 Acres Burned: 0.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829347 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.35, -117.305 Acres Requested: 10.0 Acres Burned: 10.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829348 Date: May 6, 2026 District: Mojave Desert AQMD Location: 34.346, -117.297 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data	Rx: 192829345 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.35, -117.301 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data Rx: 192829346 Date: May 5, 2026 District: Mojave Desert AQMD Location: 34.348, -117.297 Acres Requested: 3.0 Acres Burned: 3.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830041 Date: May 5, 2026 District: South Coast AQMD Location: 33.608, -117.354 Acres Requested: 19.0 Acres Burned: 19.0 Smoke Simulation: Bluesky Smoke Data Rx: 192830042 Date: May 5, 2026 District: South Coast AQMD Location: 33.61, -117.353 Acres Requested: 2.0 Acres Burned: 2.0 Smoke Simulation: Bluesky Smoke Data
840060655002	No fires	No fires	Rx: 192829750 Date: May 5, 2026 District: San Diego County APCD Location: 33.386, -116.794 Acres Requested: 5.0 Acres Burned: 5.0 Smoke Simulation: Bluesky Smoke Data

Wildfires within 100 Miles

Monitor AQS ID	2-Day Range to Exceedance Date
060290007	Wildfire: Baker Fire Acres Burned: 95.00 Date Created: May 6, 2026 Date extinguished: None Date Last Updated: May 7, 2026, 2:26 p.m. Wildfire: Tower Fire Acres Burned: 2469.00 Date Created: May 3, 2026 Date extinguished: None Date Last Updated: May 6, 2026, 8:22 a.m. Wildfire: General Fire Acres Burned: 25.00 Date Created: May 6, 2026 Date extinguished: May 6, 2026 Date Last Updated: May 8, 2026, 1:13 a.m. Wildfire: Canyon Fire Acres Burned: 2278.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 9, 2026, 10:22 a.m. Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
060658001	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
060650012	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
060658005	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
060659001	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
060714003	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
060719004	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.
840060655002	Wildfire: Acorn Fire Acres Burned: 10.00 Date Created: May 7, 2026 Date extinguished: None Date Last Updated: May 8, 2026, 11:53 a.m.

Fire Emission Analysis

Monitor AQS ID	Emission Analysis
060290007	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Edison. 5 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: Tower Fire, which burned 2469.00, started on May 03, 2026, and last updated on May 06, 2026. It was located 3.4 miles away. General Fire, which burned 25.00, started on May 06, 2026, and ended on May 06, 2026. It was located 7.9 miles away. Baker Fire, which burned 95.00, started on May 06, 2026, and last updated on May 07, 2026. It was located 9.9 miles away. Canyon Fire, which burned 2278.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 56.9 miles away. Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 93.6 miles away. In addition to these wildfires, one prescribed fire was also recorded within the past three days (from two days before the event to the event day). This controlled burn, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829708, which burned approximately 1.0 acres on 2026-05-05, and was located 31.7 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 739 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. However, satellite imagery does not show clear evidence of smoke reaching the monitoring site. This suggests that further analysis is needed to determine whether other factors contributed to the elevated ozone levels.
060658001	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Riverside - Rubidoux. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 32.3 miles away. In addition to these wildfires, 10 prescribed fires were also recorded within the past three days (from two days before the event to the event day). These controlled burns, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829349, which burned approximately 23.2 acres on 2026-05-07, and was located 24.8 miles away; Prescribed Fire ID 192829346, which burned approximately 3.0 acres on 2026-05-05, and was located 25.0 miles away; Prescribed Fire ID 192829345, which burned approximately 2.0 acres on 2026-05-05, and was located 25.0 miles away; Prescribed Fire ID 192830042, which burned approximately 2.0 acres on 2026-05-05, and was located 27.1 miles away; Prescribed Fire ID 192830041, which burned approximately 19.0 acres on 2026-05-05, and was located 27.2 miles away; Prescribed Fire ID 192830307, which burned approximately 11.0 acres on 2026-05-07, and was located 24.6 miles away; Prescribed Fire ID 192830308, which burned approximately 30.0 acres on 2026-05-07, and was located 22.6 miles away; Prescribed Fire ID 192829347, which burned approximately 10.0 acres on 2026-05-06, and was located 25.0 miles away; Prescribed Fire ID 192829348, which burned approximately 5.0 acres on 2026-05-06, and was located 24.8 miles away; Prescribed Fire ID 192829350, which burned approximately 23.2 acres on 2026-05-07, and was located 24.8 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 848 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.
060650012	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Banning - South Hathaway Street. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 56.6 miles away. In addition to these wildfires, 9 prescribed fires were also recorded within the past three days (from two days before the event to the event day). These controlled burns, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829349, which burned approximately 23.2 acres on 2026-05-07, and was located 39.0 miles away; Prescribed Fire ID 192829346, which burned approximately 3.0 acres on 2026-05-05, and was located 38.7 miles away; Prescribed Fire ID 192829345, which burned approximately 2.0 acres on 2026-05-05, and was located 39.0 miles away; Prescribed Fire ID 192830042, which burned approximately 2.0 acres on 2026-05-05, and was located 35.6 miles away; Prescribed Fire ID 192830041, which burned approximately 19.0 acres on 2026-05-05, and was located 35.8 miles away; Prescribed Fire ID 192829750, which burned approximately 5.0 acres on 2026-05-05, and was located 37.0 miles away; Prescribed Fire ID 192829347, which burned approximately 10.0 acres on 2026-05-06, and was located 39.1 miles away; Prescribed Fire ID 192829348, which burned approximately 5.0 acres on 2026-05-06, and was located 38.6 miles away; Prescribed Fire ID 192829350, which burned approximately 23.2 acres on 2026-05-07, and was located 39.0 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 853 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.
060658005	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Mira Loma - Van Buren. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 31.2 miles away. In addition to these wildfires, 10 prescribed fires were also recorded within the past three days (from two days before the event to the event day). These controlled burns, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829349, which burned approximately 23.2 acres on 2026-05-07, and was located 26.5 miles away; Prescribed Fire ID 192829346, which burned approximately 3.0 acres on 2026-05-05, and was located 26.7 miles away; Prescribed Fire ID 192829345, which burned approximately 2.0 acres on 2026-05-05, and was located 26.7 miles away; Prescribed Fire ID 192830042, which burned approximately 2.0 acres on 2026-05-05, and was located 27.8 miles away; Prescribed Fire ID 192830041, which burned approximately 19.0 acres on 2026-05-05, and was located 27.9 miles away; Prescribed Fire ID 192830307, which burned approximately 11.0 acres on 2026-05-07, and was located 20.2 miles away; Prescribed Fire ID 192830308, which burned approximately 30.0 acres on 2026-05-07, and was located 18.2 miles away; Prescribed Fire ID 192829347, which burned approximately 10.0 acres on 2026-05-06, and was located 26.6 miles away; Prescribed Fire ID 192829348, which burned approximately 5.0 acres on 2026-05-06, and was located 26.6 miles away; Prescribed Fire ID 192829350, which burned approximately 23.2 acres on 2026-05-07, and was located 26.5 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 848 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.
060659001	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Lake Elsinore - W. Flint Street. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 55.0 miles away. In addition to these wildfires, 11 prescribed fires were also recorded within the past three days (from two days before the event to the event day). These controlled burns, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829349, which burned approximately 23.2 acres on 2026-05-07, and was located 46.3 miles away; Prescribed Fire ID 192829346, which burned approximately 3.0 acres on 2026-05-05, and was located 46.3 miles away; Prescribed Fire ID 192829345, which burned approximately 2.0 acres on 2026-05-05, and was located 46.4 miles away; Prescribed Fire ID 192830042, which burned approximately 2.0 acres on 2026-05-05, and was located 4.8 miles away; Prescribed Fire ID 192830041, which burned approximately 19.0 acres on 2026-05-05, and was located 4.9 miles away; Prescribed Fire ID 192829750, which burned approximately 5.0 acres on 2026-05-05, and was located 36.9 miles away; Prescribed Fire ID 192830307, which burned approximately 11.0 acres on 2026-05-07, and was located 35.0 miles away; Prescribed Fire ID 192830308, which burned approximately 30.0 acres on 2026-05-07, and was located 34.3 miles away; Prescribed Fire ID 192829347, which burned approximately 10.0 acres on 2026-05-06, and was located 46.4 miles away; Prescribed Fire ID 192829348, which burned approximately 5.0 acres on 2026-05-06, and was located 46.2 miles away; Prescribed Fire ID 192829350, which burned approximately 23.2 acres on 2026-05-07, and was located 46.3 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 838 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. However, satellite imagery does not show clear evidence of smoke reaching the monitoring site. This suggests that further analysis is needed to determine whether other factors contributed to the elevated ozone levels.
060714003	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Redlands - Dearborn. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 37.8 miles away. In addition to these wildfires, 10 prescribed fires were also recorded within the past three days (from two days before the event to the event day). These controlled burns, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829349, which burned approximately 23.2 acres on 2026-05-07, and was located 21.8 miles away; Prescribed Fire ID 192829346, which burned approximately 3.0 acres on 2026-05-05, and was located 21.6 miles away; Prescribed Fire ID 192829345, which burned approximately 2.0 acres on 2026-05-05, and was located 21.9 miles away; Prescribed Fire ID 192830042, which burned approximately 2.0 acres on 2026-05-05, and was located 33.2 miles away; Prescribed Fire ID 192830041, which burned approximately 19.0 acres on 2026-05-05, and was located 33.3 miles away; Prescribed Fire ID 192830307, which burned approximately 11.0 acres on 2026-05-07, and was located 40.5 miles away; Prescribed Fire ID 192830308, which burned approximately 30.0 acres on 2026-05-07, and was located 38.4 miles away; Prescribed Fire ID 192829347, which burned approximately 10.0 acres on 2026-05-06, and was located 22.0 miles away; Prescribed Fire ID 192829348, which burned approximately 5.0 acres on 2026-05-06, and was located 21.5 miles away; Prescribed Fire ID 192829350, which burned approximately 23.2 acres on 2026-05-07, and was located 21.8 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 848 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.
060719004	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at San Bernadino - 4th Street. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 30.4 miles away. In addition to these wildfires, 10 prescribed fires were also recorded within the past three days (from two days before the event to the event day). These controlled burns, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829349, which burned approximately 23.2 acres on 2026-05-07, and was located 16.7 miles away; Prescribed Fire ID 192829346, which burned approximately 3.0 acres on 2026-05-05, and was located 16.7 miles away; Prescribed Fire ID 192829345, which burned approximately 2.0 acres on 2026-05-05, and was located 16.8 miles away; Prescribed Fire ID 192830042, which burned approximately 2.0 acres on 2026-05-05, and was located 34.5 miles away; Prescribed Fire ID 192830041, which burned approximately 19.0 acres on 2026-05-05, and was located 34.7 miles away; Prescribed Fire ID 192830307, which burned approximately 11.0 acres on 2026-05-07, and was located 34.2 miles away; Prescribed Fire ID 192830308, which burned approximately 30.0 acres on 2026-05-07, and was located 32.0 miles away; Prescribed Fire ID 192829347, which burned approximately 10.0 acres on 2026-05-06, and was located 16.9 miles away; Prescribed Fire ID 192829348, which burned approximately 5.0 acres on 2026-05-06, and was located 16.5 miles away; Prescribed Fire ID 192829350, which burned approximately 23.2 acres on 2026-05-07, and was located 16.7 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 848 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.
840060655002	On May 07, 2026, an analysis was conducted to assess the potential impact of nearby fire activity on ozone levels at Palm Springs. One wildfire was detected within 100 miles of the site from two days before the event to the event day. The proximity of this fire to the site suggests it may have contributed to elevated ozone levels on this date. The following wildfires were identified: Acorn Fire, which burned 10.00, started on May 07, 2026, and last updated on May 08, 2026. It was located 75.0 miles away. In addition to these wildfires, one prescribed fire was also recorded within the past three days (from two days before the event to the event day). This controlled burn, while intended for land management, may have influenced local air quality. The following prescribed fires were identified: Prescribed Fire ID 192829750, which burned approximately 5.0 acres on 2026-05-05, and was located 35.8 miles away In addition to reported prescribed fire and wildfire records from CAL FIRE and the Prescribed Fire Reporting System (PFIRS), satellite imagery detected 863 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. However, satellite imagery does not show clear evidence of smoke reaching the monitoring site. This suggests that further analysis is needed to determine whether other factors contributed to the elevated ozone levels.

High-Split Trajectory for Ozone Exceedance Monitor Site

HYSPLIT back trajectories are not available for Edison, 060290007.

HYSPLIT back trajectories are not available for Riverside - Rubidoux, 060658001.

HYSPLIT back trajectories are not available for Banning - South Hathaway Street, 060650012.

HYSPLIT back trajectories are not available for Mira Loma - Van Buren, 060658005.

HYSPLIT back trajectories are not available for Lake Elsinore - W. Flint Street, 060659001.

HYSPLIT back trajectories are not available for Redlands - Dearborn, 060714003.

HYSPLIT back trajectories are not available for San Bernadino - 4th Street, 060719004.

HYSPLIT back trajectories are not available for Palm Springs, 840060655002.