PM10 24 Hour Average (µg/m3)

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

01/21 01/22 01/23 01/24 01/25 01/26 01/27

San Joaquin

Stockton-University 21 31 46 48 39 45 50

Manteca 26 25 39 40 30 43 31

Tracy-Airport 17 11 21 24 18 26 16

Stanislaus

Modesto-14th 29 39 44 46 42 47 47

Turlock

Merced

Merced-M St.

Merced-Coffee

Madera

Madera-City 30 41 32 30 32 38 33

Madera

Fresno

Fresno-SSP

Clovis 47 45 32 49 60 52 46

Fresno-Garland 45 48 45 39 45 42 44

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 65 73

Parlier

Tranquillity

Huron

Kings

Hanford 43 39 42 46 47 50 60

Corcoran 44 39 38 45 56 53 63

Tulare

Visalia, Church

Porterville

Ash Mountain-SNP

Lower Kaweah-SNP

Kern

Shafter

Oildale 79 45 29 36 43 38 49

Bakersfield-Gold 63 61

Bakersfield-Calif 75 50 41 43 57 50 58

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

District Maximum 79
50
46
49
60
65
73

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

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

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

O3-1hr (ppb) 51
Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 0

O3-8hr (ppb) 48
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 0

PM 10 (µg/m³) 79
Federal 2006 24-hr PM2.5 15
State 24-hr PM10 11

PM 2.5 (µg/m³) 53.9
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, January 28, 2022 Page 1 of 1