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.

10/21
10/22
10/23
10/24
10/25
10/26
10/27

San Joaquin

Stockton-Hazelton 50 (PM25) 42 (PM25) 33 (PM25) 38 (O3-8) 42 (PM25) 33 (PM25) 57 (PM25)

Manteca 54 (PM10) 88 (PM10) 43 (PM10) 46 (PM25) 105 (PM10) 83 (PM10) 85 (PM10)

Tracy-Airport 37 (O3-8) 72 (PM10) 25 (PM25) 42 (PM25) 75 (PM10) 59 (PM10) 54 (PM10)

Stanislaus

Modesto-14th 62 (PM10) 84 (PM10) 39 (PM10) 46 (O3-8) 69 (PM10) 88 (PM10) 81 (PM10)

Turlock 53 (PM25) 42 (PM25) 35 (O3-8) 46 (O3-8) 42 (PM25) 55 (PM25) 53 (PM25)

Merced

Merced-Coffee 62 (PM25) 50 (PM25) 38 (O3-8) 47 (O3-8) 42 (PM25) 50 (PM25) 64 (PM25)

Madera

Madera-City 93 (PM25) 80 (PM10) 64 (PM10) 52 (PM10) 52 (PM10) 109 (PM10) 94 (PM10)

Madera 51 (O3-8) 46 (O3-8) 38 (O3-8) 41 (O3-8) 35 (O3-8) 25 (O3-8) 32 (O3-8)

Fresno

Fresno-SSP 58 (O3-8) 64 (O3-8) 43 (O3-8) 44 (O3-8) 37 (O3-8) 24 (O3-8) 31 (O3-8)

Clovis 85 (PM25) 115 (O3-8) 89 (PM10) 65 (PM10) 46 (PM25) 108 (PM10) 88 (PM10)

Fresno-Garland 70 (PM25) 70 (PM10) 70 (PM10) 60 (PM10) 43 (PM10) 97 (PM10) 86 (PM10)

Fresno-Foundry 80 (PM25) 78 (PM25) 57 (PM25) 57 (PM25) 42 (PM25) 64 (PM25) 78 (PM25)

Fresno-Drummond 54 (O3-8) 64 (O3-8) 39 (O3-8) 44 (O3-8) 36 (O3-8) 19 (O3-8) 31 (O3-8)

Parlier 64 (O3-8) 97 (O3-8) 40 (O3-8) 48 (O3-8) 38 (O3-8) 23 (O3-8) 37 (O3-8)

Tranquillity 55 (PM25) 68 (PM25) 42 (PM25) 41 (O3-8) 46 (PM25) 68 (PM25) 59 (PM25)

Huron 25 (PM25) 21 (PM25) 21 (PM25) 29 (PM25) 33 (PM25) 55 (PM25) 53 (PM25)

Kings

Hanford 93 (PM10) 101 (PM10) 80 (PM10) 65 (PM10) 50 (PM10) 160 (PM10) 115 (PM10)

Corcoran 93 (PM10) 96 (PM10) 81 (PM10) 65 (PM10) 46 (PM25) 149 (PM10) 115 (PM10)

Tulare

Visalia, Church 84 (O3-8) 90 (O3-8) 91 (PM10) 75 (PM10) 46 (PM25) 151 (PM10) 88 (PM10)

Porterville 112 (O3-8) 105 (O3-8) 50 (PM25) 47 (O3-8) 39 (O3-8) 57 (PM25) 39 (O3-8)

Ash Mountain-SNP 115 (O3-8) 126 (O3-8) 80 (O3-8) 71 (O3-8) 49 (O3-8) 50 (PM25) 53 (PM25)

Lower Kaweah-SNP 47 (O3-8) 97 (O3-8) 54 (O3-8) 51 (O3-8) 47 (O3-8) 35 (O3-8) 44 (O3-8)

Kern

Shafter 87 (O3-8) 67 (O3-8) 36 (O3-8) 47 (O3-8) 35 (O3-8)

Oildale 79 (PM10) 85 (PM10) 88 (PM10) 69 (PM10) 38 (PM10) 112 (PM10) 85 (PM10)

Bakersfield-Calif 72 (PM25) 68 (PM25) 55 (PM25) 53 (PM25) 50 (PM25) 55 (PM25) 57 (PM25)

Bakersfield-Muni 84 (O3-8) 80 (O3-8) 41 (O3-8) 45 (O3-8) 33 (O3-8) 31 (O3-8) 36 (O3-8)

Edison 112 (O3-8) 101 (O3-8) 44 (O3-8) 49 (O3-8) 38 (O3-8) 30 (O3-8) 43 (O3-8)

Arvin-DiGiorgio 97 (O3-8) 93 (O3-8) 44 (O3-8) 47 (O3-8) 35 (O3-8) 35 (O3-8) 42 (O3-8)

Maricopa 93 (O3-8) 93 (O3-8) 43 (O3-8) 47 (O3-8) 36 (O3-8) 36 (O3-8) 44 (O3-8)

Lebec 64 (PM25) 57 (PM25) 29 (PM25) 33 (PM25) 38 (PM25) 38 (PM25) 38 (PM25)

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 116
Federal 1997 24-hr PM2.5 0

O3-1hr (ppb) 122
Federal 2008 8-Hr Ozone 86
Federal 24-hr PM10 0

O3-8hr (ppb) 95
Federal 1997 8-Hr Ozone 10
State 1-Hr Ozone 42

PM 10 (µg/m³) 153
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 116

PM 2.5 (µg/m³) 58
Federal 2006 24-hr PM2.5 2
State 24-hr PM10 150
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!
Wednesday, October 28, 2020 Page 1 of 1