| | 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. |
| | 01/21 | | 01/22 | | 01/23 | | 01/24 | | 01/25 | | 01/26 | | 01/27 |
| | San Joaquin |
| | Stockton-University | 48 (PM25) | 65 (PM25) | 98 (PM25) | 82 (PM25) | 79 (PM25) | 76 (PM25) | 75 (PM25) |
| | Manteca | 52 (PM25) | 64 (PM25) | 96 (PM25) | 84 (PM25) | 69 (PM25) | 84 (PM25) | 67 (PM25) |
| | Tracy-Airport | 31 (O3-8) | 31 (O3-8) | 45 (PM25) | 39 (PM25) | 29 (O3-8) | 54 (PM25) | 29 (O3-8) |
| | Stanislaus |
| | Modesto-14th | 62 (PM25) | 81 (PM25) | 102 (PM25) | 91 (PM25) | 84 (PM25) | 90 (PM25) | 84 (PM25) |
| | Turlock | 57 (PM25) | 99 (PM25) | 79 (PM25) | 75 (PM25) | 76 (PM25) | 83 (PM25) | 82 (PM25) |
| | Merced |
| | Merced-M St. | 86 (PM25) | 115 (PM25) | 85 (PM25) | 69 (PM25) | 73 (PM25) | 82 (PM25) | 77 (PM25) |
| | Merced-Coffee | 78 (PM25) | 95 (PM25) | 78 (PM25) | 61 (PM25) | 64 (PM25) | 82 (PM25) | 73 (PM25) |
| | Madera |
| | Madera-City | 81 (PM25) | 94 (PM25) | 75 (PM25) | 64 (PM25) | 70 (PM25) | 68 (PM25) | 61 (PM25) |
| | Madera | 17 (O3-8) | 27 (O3-8) | 32 (O3-8) | 31 (O3-8) | 35 (O3-8) | 36 (O3-8) | 38 (O3-8) |
| | Fresno |
| | Fresno-SSP | 14 (O3-8) | 23 (O3-8) | 31 (O3-8) | 31 (O3-8) | 28 (O3-8) | 34 (O3-8) | 35 (O3-8) |
| | Clovis | 97 (PM25) | 93 (PM25) | 73 (PM25) | 68 (PM25) | 86 (PM25) | 70 (PM25) | 67 (PM25) |
| | Fresno-Garland | 105 (PM25) | 106 (PM25) | 94 (PM25) | 76 (PM25) | 82 (PM25) | 77 (PM25) | 74 (PM25) |
| | Fresno-Foundry | 127 (PM25) | 112 (PM25) | 103 (PM25) | 77 (PM25) | 105 (PM25) | 90 (PM25) | 96 (PM25) |
| | Fresno-Pacific | 123 (PM25) | 111 (PM25) | 95 (PM25) | 71 (PM25) | 84 (PM25) | 80 (PM25) | 80 (PM25) |
| | Fresno-Drummond | 8 (O3-8) | 26 (O3-8) | 29 (O3-8) | 28 (O3-8) | 24 (O3-8) | 56 (PM10) | 60 (PM10) |
| | Parlier | 14 (O3-8) | 31 (O3-8) | 33 (O3-8) | 32 (O3-8) | 33 (O3-8) | 35 (O3-8) | 37 (O3-8) |
| | Tranquillity | 57 (PM25) | 49 (PM25) | 37 (PM25) | 38 (PM25) | 54 (PM25) | 61 (PM25) | 61 (PM25) |
| | Huron | 60 (PM25) | 26 (PM25) | 38 (PM25) | 43 (PM25) | 57 (PM25) | 62 (PM25) | 65 (PM25) |
| | Kings |
| | Hanford | 94 (PM25) | 87 (PM25) | 89 (PM25) | 86 (PM25) | 86 (PM25) | 88 (PM25) | 102 (PM25) |
| | Corcoran | 97 (PM25) | 87 (PM25) | 77 (PM25) | 83 (PM25) | 91 (PM25) | 88 (PM25) | 103 (PM25) |
| | Tulare |
| | Visalia, Church |
| | Porterville | 103 (PM25) | 71 (PM25) | 53 (PM25) | 55 (PM25) | 72 (PM25) | 61 (PM25) | 54 (PM25) |
| | Ash Mountain-SNP | 64 (PM25) | 39 (PM25) | 37 (O3-8) | 34 (O3-8) | 36 (O3-8) | 38 (O3-8) | 38 (O3-8) |
| | Lower Kaweah-SNP | 42 (O3-8) | 43 (O3-8) | 43 (O3-8) | 40 (O3-8) | 38 (O3-8) | 39 (O3-8) | 41 (O3-8) |
| | Kern |
| | Shafter | 21 (O3-8) | 26 (O3-8) | 29 (O3-8) | 31 (O3-8) | 31 (O3-8) | 31 (O3-8) | 31 (O3-8) |
| | Oildale | 63 (PM10) | 42 (PM10) | 32 (O3-8) | 33 (PM10) | 40 (PM10) | 35 (PM10) | 45 (PM10) |
| | Bakersfield-Gold | 81 (PM25) | 73 (PM25) |
| | Bakersfield-Calif | 143 (PM25) | 87 (PM25) | 77 (PM25) | 66 (PM25) | 76 (PM25) | 67 (PM25) | 75 (PM25) |
| | Bakersfield-Muni | 19 (O3-8) | 25 (O3-8) | 26 (O3-8) | 26 (O3-8) | 29 (O3-8) | 29 (O3-8) |
| | Edison | 20 (O3-8) | 31 (O3-8) | 29 (O3-8) | 27 (O3-8) | 33 (O3-8) | 34 (O3-8) | 34 (O3-8) |
| | Arvin-DiGiorgio | 26 (O3-8) | 27 (O3-8) | 34 (O3-8) | 36 (O3-8) | 35 (O3-8) | 34 (O3-8) | 36 (O3-8) |
| | Maricopa | 31 (O3-8) | 32 (O3-8) | 36 (O3-8) | 40 (O3-8) | 44 (O3-8) | 40 (O3-8) | 41 (O3-8) |
| | Lebec | 77 (PM25) | 19 (PM25) | 4 (PM25) | 15 (PM25) | 4 (PM25) | 4 (PM25) |
| | Maximum Measured | Unofficial Days Over the Federal and State Standards¹ |
| | Value for This Year |
| | Pollutant | Maximum | Federal 2015 8-Hr Ozone | 0 | | Federal 1997 24-hr PM2.5 | 0 |
| | O3-1hr (ppb) | 51 | | Federal 2008 8-Hr Ozone | 0 | | Federal 24-hr PM10 | 0 |
| | O3-8hr (ppb) | 48 | | Federal 1997 8-Hr Ozone | 0 | | State 1-Hr Ozone | 0 |
| | PM 10 (µg/m³) | 79 | | Federal 1-Hr Ozone | 0 | | State 1997 8-Hr Ozone | 0 |
| | PM 2.5 (µg/m³) | 53.9 | | Federal 2006 24-hr PM2.5 | 15 | | State 24-hr PM10 | 11 |
| 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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| Friday, January 28, 2022 | Page 1 of 1 |