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Ozone Seasons
March 24, 2025
AQS Reference Table
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| State Code | County Code | Site Number | State Name | County Name | Begin Month | Begin Day | End Month | End Day |
|---|---|---|---|---|---|---|---|---|
| 01 | Alabama | 3 | 1 | 10 | 31 | |||
| 01 | 073 | 0023 | Alabama | Jefferson | 1 | 1 | 12 | 31 |
| 02 | Alaska | 4 | 1 | 10 | 31 | |||
| 02 | 090 | 0034 | Alaska | Fairbanks North Star | 1 | 1 | 12 | 31 |
| 04 | Arizona | 1 | 1 | 12 | 31 | |||
| 04 | 005 | 1008 | Arizona | Coconino | 1 | 1 | 12 | 31 |
| 04 | 007 | 0010 | Arizona | Gila | 1 | 1 | 12 | 31 |
| 04 | 012 | 8000 | Arizona | La Paz | 1 | 1 | 12 | 31 |
| 04 | 013 | 7022 | Arizona | Maricopa | 1 | 1 | 12 | 31 |
| 04 | 013 | 7024 | Arizona | Maricopa | 1 | 1 | 12 | 31 |
| 04 | 013 | 9997 | Arizona | Maricopa | 1 | 1 | 12 | 31 |
| 04 | 019 | 1028 | Arizona | Pima | 1 | 1 | 12 | 31 |
| 04 | 021 | 8001 | Arizona | Pinal | 1 | 1 | 12 | 31 |
| 04 | 025 | 8033 | Arizona | Yavapai | 1 | 1 | 12 | 31 |
| 04 | 025 | 8034 | Arizona | Yavapai | 1 | 1 | 12 | 31 |
| 04 | 027 | 8011 | Arizona | Yuma | 1 | 1 | 12 | 31 |
| 05 | Arkansas | 3 | 1 | 11 | 30 | |||
| 05 | 119 | 0007 | Arkansas | Pulaski | 1 | 1 | 12 | 31 |
| 06 | California | 1 | 1 | 12 | 31 | |||
| 06 | 017 | 0011 | California | El Dorado | 1 | 1 | 12 | 31 |
| 06 | 017 | 0012 | California | El Dorado | 4 | 1 | 10 | 31 |
| 06 | 017 | 0020 | California | El Dorado | 4 | 1 | 10 | 31 |
| 06 | 019 | 0011 | California | Fresno | 1 | 1 | 12 | 31 |
| 06 | 027 | 0002 | California | Inyo | 1 | 1 | 12 | 31 |
| 06 | 043 | 0006 | California | Mariposa | 4 | 1 | 10 | 31 |
Showing 1 to 25 of 498 entries