PM10 24 Hour Average (µg/m3)

The information in this report is based on preliminary data and is subject to change.

09/10 09/11 09/12 09/13 09/14 09/15 09/16

San Joaquin

Stockton-Hazelton 31 24 24 39 46 42 30

Manteca 31 26 24 47 47 52 39

Tracy-Airport 16 19 16 41 42 45 38

Stanislaus

Modesto-14th 38 32 27 55 54 56 51

Turlock

Merced

Merced-M St.

Merced-Coffee

Madera

Madera-City 66 50 44 74 91 90 89

Madera

Fresno

Fresno-SSP

Clovis 63 36 34 57 72 85 86

Fresno-Garland 65 37 35 48 65 79 80

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond

Parlier

Tranquillity

Huron

Kings

Hanford 99 64 38 84 89 123 113

Corcoran 103 69 58 103 126 111

Tulare

Visalia, Church 83 59 51 54 81 98 101

Porterville

Ash Mountain-SNP

Lower Kaweah-SNP

Kern

Shafter

Oildale 74 78 58 53 72 77 87

Bakersfield-Gold

Bakersfield-Calif

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

District Maximum 103
78
58
103
91
126
113

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 93
Federal 1997 24-hr PM2.5 0

Federal 2008 8-Hr Ozone 70
Federal 24-hr PM10 0

O3-1hr (ppb) 116
Federal 1997 8-Hr Ozone 16
State 1-Hr Ozone 36

O3-8hr (ppb) 100
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 93

PM 10 (µg/m³) 149
Federal 2006 24-hr PM2.5 15
State 24-hr PM10 148

PM 2.5 (µg/m³) 63.5
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, September 17, 2021 Page 1 of 1