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