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.

06/21
06/22
06/23
06/24
06/25
06/26
06/27

San Joaquin

Stockton-University 48 (O3-8) 100 (O3-8) 74 (O3-8) 50 (O3-8) 50 (O3-8) 41 (O3-8)

Manteca 30 (PM10) 57 (PM10) 38 (PM25) 31 (PM25) 28 (PM25) 21 (PM25) 29 (PM10)

Tracy-Airport 49 (O3-8) 47 (PM10) 84 (O3-8) 67 (O3-8) 51 (O3-8) 47 (O3-8) 45 (O3-8)

Stanislaus

Modesto-14th 90 (O3-8) 57 (PM10) 101 (O3-8) 101 (O3-8) 71 (O3-8) 67 (O3-8) 48 (O3-8)

Turlock 97 (O3-8) 63 (PM10) 108 (O3-8) 108 (O3-8) 80 (O3-8) 74 (O3-8) 67 (O3-8)

Merced

Merced-M St. 35 (PM10) 60 (PM10) 38 (PM10) 32 (PM25) 21 (PM10) 20 (PM10) 29 (PM10)

Merced-Coffee 80 (O3-8) 58 (O3-8) 90 (O3-8) 100 (O3-8) 67 (O3-8) 51 (O3-8) 51 (O3-8)

Madera

Madera-City 77 (O3-8) 65 (PM10) 80 (O3-8) 90 (O3-8) 71 (O3-8) 47 (O3-8) 71 (O3-8)

Madera 74 (O3-8) 64 (O3-8) 74 (O3-8) 84 (O3-8) 64 (O3-8) 45 (O3-8)

Fresno

Fresno-SSP 71 (O3-8) 50 (O3-8) 74 (O3-8) 97 (O3-8) 61 (O3-8) 48 (O3-8) 67 (O3-8)

Clovis 90 (O3-8) 67 (PM10) 93 (O3-8) 115 (O3-8) 90 (O3-8) 71 (O3-8) 100 (O3-8)

Fresno-Garland 67 (O3-8) 70 (PM10) 58 (O3-8) 84 (O3-8) 67 (O3-8) 51 (O3-8) 67 (O3-8)

Fresno-Foundry 44 (PM25) 51 (PM25) 47 (PM25) 60 (PM25) 37 (PM25) 29 (PM25) 31 (PM25)

Fresno-Pacific 47 (PM25) 46 (PM25) 44 (PM25) 66 (PM25) 48 (PM25) 40 (PM25) 41 (PM25)

Fresno-Drummond 87 (O3-8) 99 (PM10) 77 (O3-8) 101 (O3-8) 87 (O3-8) 67 (O3-8) 87 (O3-8)

Parlier 101 (O3-8) 48 (O3-8) 77 (O3-8) 122 (O3-8) 101 (O3-8) 90 (O3-8) 105 (O3-8)

Tranquillity 58 (O3-8) 47 (O3-8) 49 (O3-8) 64 (O3-8) 50 (O3-8) 49 (O3-8) 48 (O3-8)

Huron 34 (PM25) 38 (PM25) 31 (PM25) 38 (PM25) 29 (PM25) 24 (PM25) 30 (PM25)

Kings

Hanford 87 (O3-8) 79 (PM10) 74 (O3-8) 87 (O3-8) 77 (O3-8) 61 (O3-8) 87 (O3-8)

Corcoran 53 (PM10) 46 (PM10) 46 (PM10) 43 (PM10) 35 (PM10) 27 (PM10) 43 (PM10)

Tulare

Visalia-Ashland 115 (O3-8) 47 (O3-8) 84 (O3-8) 133 (O3-8) 112 (O3-8) 90 (O3-8) 129 (O3-8)

Porterville 122 (O3-8) 43 (O3-8) 90 (O3-8) 126 (O3-8) 115 (O3-8) 105 (O3-8) 122 (O3-8)

Ash Mountain-SNP 108 (O3-8) 46 (O3-8) 67 (O3-8) 101 (O3-8) 122 (O3-8) 119 (O3-8) 129 (O3-8)

Lower Kaweah-SNP 84 (O3-8) 41 (O3-8) 47 (O3-8) 90 (O3-8) 100 (O3-8) 101 (O3-8) 115 (O3-8)

Kern

Shafter 93 (O3-8) 45 (O3-8) 67 (O3-8) 122 (O3-8) 80 (O3-8) 77 (O3-8) 80 (O3-8)

Oildale 97 (O3-8) 44 (O3-8) 101 (O3-8) 87 (O3-8) 84 (O3-8) 97 (O3-8)

Bakersfield-Gold 65 (PM10) 41 (PM10) 52 (PM25) 44 (PM10) 39 (PM10) 36 (PM25) 44 (PM10)

Bakersfield-Calif 67 (O3-8) 47 (PM25) 54 (PM25) 64 (O3-8) 51 (O3-8) 50 (O3-8) 54 (O3-8)

Bakersfield-Muni 108 (O3-8) 41 (O3-8) 71 (O3-8) 93 (O3-8) 74 (O3-8) 71 (O3-8) 90 (O3-8)

Edison 77 (O3-8) 100 (O3-8) 97 (O3-8) 90 (O3-8) 90 (O3-8)

Arvin-DiGiorgio 129 (O3-8) 44 (O3-8) 105 (O3-8) 108 (O3-8) 90 (O3-8) 87 (O3-8) 108 (O3-8)

Maricopa 90 (O3-8) 58 (O3-8) 67 (O3-8) 97 (O3-8) 84 (O3-8) 71 (O3-8) 58 (O3-8)

Lebec 12 (PM25) 12 (PM25) 46 (PM25) 35 (PM25) 16 (PM25) 15 (PM25) 12 (PM25)

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 17
Federal 1997 24-hr PM2.5 0

O3-1hr (ppb) 94
Federal 2008 8-Hr Ozone 11
Federal 24-hr PM10 0

O3-8hr (ppb) 83
Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 0

PM 10 (µg/m³) 152
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 17

PM 2.5 (µg/m³) 53.9
Federal 2006 24-hr PM2.5 26
State 24-hr PM10 87
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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Tuesday, June 28, 2022 Page 1 of 1