Latest Week Ozone Summary for Selected Regions (Preliminary Data in PST)
Data on this page extracted on March 19, 2024 at 04:50:42
Region |
Latest 7 Days (ending 03/18/2024)
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This Year-to-Date
through 03/18/2024 |
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Days Exceeding National Standards
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Maximum
Concentration (ppm) |
Maximum
Concentration (ppm) |
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8-hr Std
0.08 ppm |
8-hr Std
0.075 ppm |
8-hr Std
0.070 ppm |
1-hour
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8-hour
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1-hour
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8-hour
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Sacramento Metropolitan Area1 |
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San Diego Air Basin |
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San Francisco Bay Area Air Basin |
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San Joaquin Valley Air Basin |
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South Coast Air Basin |
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Ventura County (Mainland Only) |
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Antelope Valley and W. Mojave Desert |
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Coachella Valley |
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Mojave Desert (remaining areas) |
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Eastern Kern County |
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Imperial County |
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Lake County2 |
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Mountain Counties - Central |
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Mountain Counties - Southern |
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North Central Coast Air Basin |
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Sacramento Valley - Butte County |
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Sacramento Valley - Sutter Buttes3 |
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Sacramento Valley (remaining areas) |
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Tuscan Buttes |
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Eastern San Luis Obispo County |
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San Luis Obispo County (remaining areas) |
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Santa Barbara County |
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Western Nevada County |
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To see monitoring site details, click a 7-day numeric value. | ||
To see underlying daily data for area, click on the year-to-date numeric value. | ||
Cell color is red if national 8-hour standard level is exceeded; Nat'l stds truncate 4 digit 8-hr avg to 3 decimals. | ||
1 | The Sacramento Metropolitan Area includes Sacramento Metropolitan Air Quality Management District, Yolo-Solano Air Pollution Control District, the southern third of Feather River Air Quality Management District, and all of El Dorado and Placer Counties except for that portion in the Lake Tahoe Air Basin. | |
2 | The Lake County Air Quality Management District is a non-real time data stream that will be updated monthly. | |
3 | The Sacramento Valley-Sutter Buttes site is a seasonal monitoring site (May through October only). |
State 1-hr: 0.090 ppm
State 8-hr: 0.070 ppm
National 1-hr: 0.12 ppm 2008 National 8-hr: 0.075 ppm 2015 National 8-hr: 0.070 ppm
Other Standards (pdf)