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.

07/23
07/24
07/25
07/26
07/27
07/28
07/29

San Joaquin

Stockton-Hazelton 66 (PM25) 57 (PM25) 50 (PM25) 46 (PM25) 50 (PM25) 77 (PM10) 57 (PM25)

Manteca 57 (PM25) 50 (PM25) 29 (PM25) 29 (PM25) 39 (PM10) 55 (PM25) 42 (PM25)

Tracy-Airport 80 (O3-8) 67 (O3-8) 49 (O3-8) 41 (O3-8) 48 (O3-8) 71 (O3-8) 80 (O3-8)

Stanislaus

Modesto-14th 90 (O3-8) 80 (O3-8) 64 (O3-8) 54 (O3-8) 61 (O3-8) 97 (O3-8) 84 (O3-8)

Turlock 100 (O3-8) 97 (O3-8) 84 (O3-8) 67 (O3-8) 67 (O3-8) 122 (O3-8) 115 (O3-8)

Merced

Merced-M St. 42 (PM25) 42 (PM25) 25 (PM25) 25 (PM25) 33 (PM25) 62 (PM25) 38 (PM25)

Merced-Coffee 112 (O3-8) 108 (O3-8) 87 (O3-8) 64 (O3-8) 90 (O3-8) 101 (O3-8) 87 (O3-8)

Madera

Madera-City 97 (O3-8) 101 (O3-8) 80 (O3-8) 84 (O3-8) 97 (O3-8) 93 (O3-8) 97 (O3-8)

Madera 84 (O3-8) 84 (O3-8) 71 (O3-8) 80 (O3-8) 84 (O3-8) 87 (O3-8) 87 (O3-8)

Fresno

Fresno-SSP 80 (O3-8) 80 (O3-8) 58 (O3-8) 64 (O3-8) 80 (O3-8) 90 (O3-8) 87 (O3-8)

Clovis 50 (PM10) 101 (O3-8) 77 (O3-8) 58 (O3-8) 97 (O3-8) 119 (O3-8) 93 (O3-8)

Fresno-Garland 90 (O3-8) 84 (O3-8) 61 (O3-8) 50 (O3-8) 74 (O3-8) 87 (O3-8) 77 (O3-8)

Fresno-Foundry 50 (PM25) 46 (PM25) 38 (PM25) 42 (PM25) 46 (PM25) 59 (PM25) 53 (PM25)

Fresno-Pacific 42 (PM25) 42 (PM25) 29 (PM25) 29 (PM25) 38 (PM25) 53 (PM25) 46 (PM25)

Fresno-Drummond 93 (O3-8) 97 (O3-8) 84 (O3-8) 51 (O3-8) 97 (O3-8) 93 (O3-8) 97 (O3-8)

Parlier 97 (O3-8) 93 (O3-8) 90 (O3-8) 58 (O3-8) 87 (O3-8) 105 (O3-8) 90 (O3-8)

Tranquillity 77 (O3-8) 61 (O3-8) 64 (O3-8) 50 (O3-8) 74 (O3-8) 78 (PM25) 71 (O3-8)

Huron 46 (PM25) 38 (PM25) 46 (PM25) 38 (PM25) 29 (PM25) 64 (PM25) 57 (PM25)

Kings

Hanford 90 (O3-8) 87 (O3-8) 61 (O3-8) 60 (PM10) 80 (O3-8) 87 (O3-8) 93 (O3-8)

Corcoran 55 (PM10) 56 (PM10) 40 (PM10) 57 (PM10) 56 (PM10) 58 (PM10) 58 (PM10)

Tulare

Visalia, Church 115 (O3-8) 119 (O3-8) 100 (O3-8) 64 (O3-8) 108 (O3-8) 129 (O3-8) 122 (O3-8)

Porterville 122 (O3-8) 126 (O3-8) 101 (O3-8) 58 (O3-8) 122 (O3-8) 122 (O3-8) 129 (O3-8)

Ash Mountain-SNP 126 (O3-8) 143 (O3-8) 129 (O3-8) 74 (O3-8) 133 (O3-8) 80 (O3-8)

Lower Kaweah-SNP 119 (O3-8) 129 (O3-8) 115 (O3-8) 87 (O3-8) 49 (O3-8) 101 (O3-8) 58 (O3-8)

Kern

Shafter 87 (O3-8) 112 (O3-8) 71 (O3-8) 40 (O3-8) 129 (O3-8) 90 (O3-8) 101 (O3-8)

Oildale 112 (O3-8) 119 (O3-8) 100 (O3-8) 61 (O3-8) 154 (O3-8) 119 (O3-8) 122 (O3-8)

Bakersfield-Gold 57 (PM25) 50 (PM25) 46 (PM25) 46 (PM25) 57 (PM25) 53 (PM25) 64 (PM25)

Bakersfield-Calif 84 (O3-8) 77 (O3-8) 58 (O3-8) 43 (O3-8) 115 (O3-8) 84 (O3-8) 90 (O3-8)

Bakersfield-Muni 97 (O3-8) 100 (O3-8) 77 (O3-8) 46 (O3-8) 143 (O3-8) 105 (O3-8) 101 (O3-8)

Edison 122 (O3-8) 129 (O3-8) 93 (O3-8) 51 (O3-8) 172 (O3-8) 136 (O3-8) 119 (O3-8)

Arvin-DiGiorgio 108 (O3-8) 112 (O3-8) 80 (O3-8) 54 (O3-8) 177 (O3-8) 119 (O3-8) 105 (O3-8)

Maricopa 71 (O3-8) 71 (O3-8) 51 (O3-8) 47 (O3-8) 84 (O3-8) 61 (O3-8) 71 (O3-8)

Lebec 33 (PM25) 29 (PM25) 33 (PM25) 29 (PM25) 25 (PM25) 46 (PM25) 46 (PM25)

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 53
Federal 1997 24-hr PM2.5 0

O3-1hr (ppb) 116
Federal 2008 8-Hr Ozone 38
Federal 24-hr PM10 0

O3-8hr (ppb) 100
Federal 1997 8-Hr Ozone 14
State 1-Hr Ozone 21

PM 10 (µg/m³) 115
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 53

PM 2.5 (µg/m³) 63.5
Federal 2006 24-hr PM2.5 15
State 24-hr PM10 100
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.
Make one change for clean air! Visit www.healthyairliving.com and become a part of the solution!
Friday, July 30, 2021 Page 1 of 1