PM25 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 11.0 14.0 X 14.5 X 19.6 x 20.6 x 20.1 x 16.3 x

Manteca 6.2 6.4 8.0 15.5 x 14.5 x 16.6 x 13.8 x

Tracy-Airport 3.7 4.2 4.9 9.0 9.0 12.3 x 10.2

Stanislaus

Modesto-14th 8.5 9.0 10.5 16.8 x 17.1 x 18.1 x 15.3 x

Turlock 7.9 7.7 8.5 16.3 x 15.5 x 17.3 x 14.7 x

Merced

Merced-M St. 5.5 6.2 5.5 11.5 12.5 x 13.4 x 12.1 x

Merced-Coffee 5.5 6.5 6.2 11.3 14.5 x 13.5 x 12.8 x

Madera

Madera-City 9.3 7.0 6.2 12.0 17.1 x 15.0 x 15.7 x

Madera

Fresno

Fresno-SSP

Clovis 7.0 4.4 6.0 10.3 15.5 x 16.8 x 16.3 x

Fresno-Garland 10.0 5.9 7.9 9.5 15.9 x 16.3 x 17.1 x

Fresno-Foundry 9.8 9.5 10.5 14.5 x 22.5 x 21.3 x 20.5 x

Fresno-Pacific 6.5 5.5 6.2 11.9 15.0 x 14.3 x 13.8 x

Fresno-Drummond

Parlier

Tranquillity 6.4 4.0 5.5 10.5 10.5 12.5 x 11.6

Huron 6.0 4.5 4.7 8.0 12.0 x 13.5 x 12.0

Kings

Hanford 9.5 5.2 5.5 12.0 16.6 x 17.8 x 15.3 x

Corcoran 11.8 7.5 7.9 14.0 x 21.6 x 19.5 x 15.7 x

Tulare

Visalia, Church 22.6 X 22.1 X 10.3 11.0 31.5 x 50.2 x 23.5 x

Porterville 10.5 6.7 7.5 10.0 19.3 x 17.5 x 13.7 x

Ash Mountain-SNP 12.0 16.3 X 83.4 X 206.8 x

Lower Kaweah-SNP

Kern

Shafter

Oildale

Bakersfield-Gold 11.9 11.3 11.0 12.5 x 15.5 x 17.5 x 16.6 x

Bakersfield-Calif 9.4 7.2 8.0 9.5 12.5 x 15.0 x 11.9

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec 7.5 3.7 4.7 5.0 6.2 8.5 9.7

District Maximum 22.6
22.1
83.4
206.8
31.5
50.2
23.5

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