Daily Report

PM10 24 Hour Average (µg/m³)

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

09/15 09/16 09/17 09/18 09/19 09/20 09/21

San Joaquin

Stockton-University 43 43 29 33 28 15 36

Manteca 40 34 23 28 29 23 21

Tracy-Airport 26 38 19 23 27 26 31

Stanislaus

Modesto-14th 46 39 27 31 38 20 31

Turlock 53 57 36 41 41 29 41

Merced

Merced-M St. 49 49 48 57 50 40 52

Merced-Vierra

Madera

Madera-City 87 78 52 68 59 57 64

Madera

Fresno

Fresno-SSP

Clovis 69 68 45 49 52 46 58

Fresno-Garland 63 66 44 53 58 50 55

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 91 87 52 61 78 57 65

Parlier

Tranquillity

Huron

Kings

Hanford 99 88 74 64 76 51 63

Corcoran 88 78 78 72 75 54 62

Tulare

Visalia-Ashland 84 87 70 63 79 65

Porterville

Ash Mountain-SNP

Kern

Shafter

Oildale 65 47 66 65 68 53 46

Bakersfield-Gold 72 58 76 77 80 66 54

Bakersfield-Calif 62 48 58 60 62 54 44

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

District Maximum 99 88 78 77 80 66 65
Maximum Measured
Value for This Year
 
PollutantMaximum
O3-1hr (ppb)101
O3-8hr (ppb)84
PM 10 (µg/m³)150
PM 2.5 (µg/m³)49.5
Unofficial Days Over the Federal and State Standards¹
 
Federal 2015 8-Hr Ozone 45
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 22
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 10
  Federal 1-Hr Ozone 0
State 2005 8-Hr Ozone 45
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 111
¹Data affected by smoke, high winds, fireworks, 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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Tuesday, September 22, 2026 Page 1 of 1