PM25 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 11.6 18.6 34.6 27.0 25.5 24.0 23.7

Manteca 12.6 18.2 33.3 27.6 20.7 27.6 19.5

Tracy-Airport 5.8 2.6 10.9 9.3 5.0 13.4 4.1

Stanislaus

Modesto-14th 17.4 26.3 36.0 31.3 27.9 30.7 27.8

Turlock 15.0 35.1 25.6 23.7 24.0 27.2 27.0

Merced

Merced-M St. 28.7 41.1 28.5 20.6 22.5 26.9 24.5

Merced-Coffee 24.9 33.1 24.9 16.8 18.3 26.7 22.6

Madera

Madera-City 26.4 32.7 23.5 18.5 20.9 20.2 17.0

Madera

Fresno

Fresno-SSP

Clovis 34.1 31.9 22.5 20.0 28.6 21.2 19.5

Fresno-Garland 37.0 37.5 32.5 24.1 27.0 24.4 23.2

Fresno-Foundry 46.2 39.8 36.3 24.4 37.1 30.7 33.5

Fresno-Pacific 44.5 39.7 33.1 21.7 28.0 25.9 25.7

Fresno-Drummond

Parlier

Tranquillity 14.8 11.7 8.9 9.2 13.7 17.0 17.0

Huron 16.6 6.3 9.1 10.4 14.9 17.1 18.7

Kings

Hanford 32.6 29.2 30.3 28.6 28.9 29.7 36.0

Corcoran 33.8 29.0 24.7 27.1 31.2 29.8 36.5

Tulare

Visalia, Church

Porterville 36.2 21.7 13.1 14.1 22.2 16.9 13.5

Ash Mountain-SNP 18.5 9.3 2.5 4.5 8.4 6.9 6.0

Lower Kaweah-SNP

Kern

Shafter

Oildale

Bakersfield-Gold 26.5 22.4

Bakersfield-Calif 52.5 29.2 24.3 19.1 23.8 19.9 23.7

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec 24.5 4.5 1.0 3.5 1.0 1.0

District Maximum 52.5
41.1
36.3
31.3
37.1
30.7
36.5

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