Latest Ozone Summary for Selected Regions (Preliminary Data in PST)
Data on this page extracted on March 18, 2024 at 23:40:33
Region |
So Far Today
(03/18/2024) |
Yesterday
(03/17/2024) |
7 Days ending
(03/17/2024) |
This Year-to-Date
through 03/17/2024 |
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Max 1hr
(ppm) |
Latest hr
(PST) |
Max 1hr
(ppm) |
Max 8hr
(ppm) |
Max 1hr
(ppm) |
Max 8hr
(ppm) |
Max 1hr
(ppm) |
Max 8hr
(ppm) |
|||
Sacramento Metropolitan Area1 |
19
|
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San Diego Air Basin |
19
|
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San Francisco Bay Area Air Basin |
19
|
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San Joaquin Valley Air Basin |
19
|
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South Coast Air Basin |
19
|
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Ventura County (Mainland Only) |
19
|
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Antelope Valley and W. Mojave Desert |
19
|
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Coachella Valley |
19
|
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Mojave Desert (remaining areas) |
19
|
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Eastern Kern County |
19
|
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Imperial County |
19
|
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Lake County2 |
N/A
|
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Mountain Counties - Central |
19
|
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Mountain Counties - Southern |
19
|
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North Central Coast Air Basin |
19
|
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Sacramento Valley - Butte County |
19
|
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Sacramento Valley - Sutter Buttes3 |
N/A
|
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Sacramento Valley (remaining areas) |
19
|
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Tuscan Buttes |
N/A
|
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Eastern San Luis Obispo County |
19
|
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San Luis Obispo County (remaining areas) |
19
|
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Santa Barbara County |
19
|
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Western Nevada County |
19
|
N/A: Data not available | ||
To see monitoring site details, click on the numeric value for today, yesterday or 7 days. | ||
To see underlying daily data for area, click on the year-to-date numeric value. | ||
To see historical trend for area, click on area name. | ||
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 |  Seasonal Ozone Sites |
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)