| | AQI by Site |
| | AQI is determined using real-time data measured at each site. AQI is based on the pollutant that measured highest. |
| | Factors such as site capabilities, seasonality, wildfire or wind events, and/or technical difficulties influence which |
| | pollutant is used to determine AQI. The data in this report is preliminary and subject to change. |
| | 09/25 | | 09/26 | | 09/27 | | 09/28 | | 09/29 | | 09/30 | | 10/01 |
| | San Joaquin |
| | Stockton-University | 45 (O3-8) | 43 (O3-8) | 44 (O3-8) | 33 (O3-8) | 23 (PM25) | 44 (O3-8) | 37 (O3-8) |
| | Manteca | 24 (PM25) | 32 (PM10) | 32 (PM10) | 23 (PM10) | 26 (PM10) | 35 (PM10) | 33 (PM10) |
| | Tracy-Airport | 50 (O3-8) | 48 (O3-8) | 45 (O3-8) | 33 (O3-8) | 37 (O3-8) | 41 (O3-8) | 41 (O3-8) |
| | Stanislaus |
| | Modesto-14th | 64 (O3-8) | 54 (O3-8) | 51 (O3-8) | 39 (O3-8) | 40 (O3-8) | 44 (O3-8) | 45 (O3-8) |
| | Turlock | 87 (O3-8) | 77 (O3-8) | 74 (O3-8) | 45 (PM10) | 43 (O3-8) | 52 (PM10) | 58 (O3-8) |
| | Merced |
| | Merced-M St. | 32 (PM25) | 57 (PM10) | 59 (PM10) | 47 (PM10) | 45 (PM10) | 47 (PM10) | 47 (PM10) |
| | Merced-Coffee | 87 (O3-8) | 90 (O3-8) | 80 (O3-8) | 44 (O3-8) | 42 (O3-8) | 54 (O3-8) | 67 (O3-8) |
| | Madera |
| | Madera-City | 74 (O3-8) | 87 (O3-8) | 87 (O3-8) | 50 (O3-8) | 42 (PM10) | 49 (O3-8) | 71 (O3-8) |
| | Madera | 74 (O3-8) | 77 (O3-8) | 74 (O3-8) | 51 (O3-8) | 42 (O3-8) | 49 (O3-8) | 71 (O3-8) |
| | Fresno |
| | Fresno-SSP | 84 (O3-8) | 90 (O3-8) | 93 (O3-8) | 67 (O3-8) | 44 (O3-8) | 54 (O3-8) | 87 (O3-8) |
| | Clovis | 97 (O3-8) | 119 (O3-8) | 101 (O3-8) | 74 (O3-8) | 45 (O3-8) | 61 (O3-8) | 87 (O3-8) |
| | Fresno-Garland | 84 (O3-8) | 93 (O3-8) | 93 (O3-8) | 71 (O3-8) | 44 (O3-8) | 58 (O3-8) | 87 (O3-8) |
| | Fresno-Foundry | 40 (PM25) | 46 (PM25) | 49 (PM25) | 44 (PM25) | 26 (PM25) | 42 (PM25) | 48 (PM25) |
| | Fresno-Pacific | 36 (PM25) | 38 (PM25) | 35 (PM25) | 34 (PM25) | 18 (PM25) | 31 (PM25) | 41 (PM25) |
| | Fresno-Drummond | 93 (O3-8) | 105 (O3-8) | 100 (O3-8) | 71 (O3-8) | 49 (PM10) | 69 (PM10) | 90 (O3-8) |
| | Parlier | 93 (O3-8) | 108 (O3-8) | 115 (O3-8) | 74 (O3-8) | 49 (O3-8) | 64 (O3-8) | 93 (O3-8) |
| | Tranquillity | 67 (O3-8) | 67 (O3-8) | 54 (O3-8) | 46 (O3-8) | 36 (O3-8) | 47 (O3-8) | 51 (O3-8) |
| | Huron | 25 (PM25) | 28 (PM25) | 30 (PM25) | 27 (PM25) | 13 (PM25) | 18 (PM25) | 24 (PM25) |
| | Kings |
| | Hanford | 108 (O3-8) | 93 (O3-8) | 108 (O3-8) | 77 (O3-8) | 59 (PM10) | 61 (O3-8) | 71 (O3-8) |
| | Corcoran | 47 (PM10) | 70 (PM10) | 74 (PM10) | 74 (PM10) | 66 (PM10) | 63 (PM10) | 58 (PM10) |
| | Tulare |
| | Visalia-Ashland | 122 (O3-8) | 136 (O3-8) | 133 (O3-8) | 101 (O3-8) | 60 (PM10) | 77 (O3-8) | 60 (PM25) |
| | Porterville | 122 (O3-8) | 126 (O3-8) | 147 (O3-8) | 126 (O3-8) | 74 (O3-8) | 84 (O3-8) | 100 (O3-8) |
| | Ash Mountain-SNP | 122 (O3-8) | 129 (O3-8) | 161 (O3-8) | 151 (O3-8) | 122 (O3-8) | 105 (O3-8) | 108 (O3-8) |
| | Lower Kaweah-SNP | 51 (O3-8) | 58 (O3-8) | 97 (O3-8) | 47 (O3-8) | 74 (O3-8) | 84 (O3-8) | 87 (O3-8) |
| | Kern |
| | Shafter | 101 (O3-8) | 105 (O3-8) | 101 (O3-8) | 84 (O3-8) | 44 (O3-8) | 77 (O3-8) | 87 (O3-8) |
| | Oildale | 133 (O3-8) | 164 (O3-8) | 133 (O3-8) | 133 (O3-8) | 70 (PM10) | 112 (O3-8) | 115 (O3-8) |
| | Bakersfield-Gold | 60 (PM10) | 65 (PM10) | 74 (PM10) | 84 (PM10) | 75 (PM10) |
| | Bakersfield-Calif | 93 (O3-8) | 119 (O3-8) | 90 (O3-8) | 90 (O3-8) | 61 (PM10) | 71 (O3-8) | 84 (O3-8) |
| | Bakersfield-Muni | 129 (O3-8) | 154 (O3-8) | 129 (O3-8) | 122 (O3-8) | 48 (O3-8) | 93 (O3-8) | 105 (O3-8) |
| | Edison | 150 (O3-8) | 129 (O3-8) | N/A () | 133 (O3-8) | 61 (O3-8) | 105 (O3-8) | 108 (O3-8) |
| | Arvin-DiGiorgio | 129 (O3-8) | 119 (O3-8) | 133 (O3-8) | 115 (O3-8) | 61 (O3-8) | 108 (O3-8) | 119 (O3-8) |
| | Maricopa | 105 (O3-8) | 101 (O3-8) | 84 (O3-8) | 100 (O3-8) | 44 (O3-8) | 74 (O3-8) | 84 (O3-8) |
| | Lebec | 17 (PM25) | 18 (PM25) | 22 (PM25) | 32 (PM25) | 21 (PM25) | 19 (PM25) | 6 (PM25) |
| | Maximum Measured | Unofficial Days Over the Federal and State Standards¹ |
| | Value for This Year |
| | Pollutant | Maximum | Federal 2015 8-Hr Ozone | 62 | | Federal 1997 24-hr PM2.5 | 0 |
| | O3-1hr (ppb) | 106 | | Federal 2008 8-Hr Ozone | 44 | | Federal 24-hr PM10 | 0 |
| | O3-8hr (ppb) | 91 | | Federal 1997 8-Hr Ozone | 5 | | State 1-Hr Ozone | 10 |
| | PM 10 (µg/m³) | 152 | | Federal 1-Hr Ozone | 0 | | State 1997 8-Hr Ozone | 62 |
| | PM 2.5 (µg/m³) | 53.9 | | Federal 2006 24-hr PM2.5 | 26 | | State 24-hr PM10 | 167 |
| ¹Data affected by smoke, high winds, fireworks, and etc. and which exceeded a federal standard are denoted |
| with an ‘x’ in the table above. Values marked with an ‘x’ are not included in the tallies above. |
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| Sunday, October 2, 2022 | Page 1 of 1 |