Daily Report

PM10 24 Hour Average (µg/m³)

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

08/15 08/16 08/17 08/18 08/19 08/20 08/21

San Joaquin

Stockton-University 13 18 23 24 37 18 18

Manteca 18 16 28 31 34 32 35

Tracy-Airport 21 20 31 36 37 29 25

Stanislaus

Modesto-14th 19 16 36 38 41 41 42

Turlock 27 19 52 51 48 45 50

Merced

Merced-M St. 40 32 66 63 59 67 60

Merced-Vierra

Madera

Madera-City 38 31 59 62 66 67 58

Madera

Fresno

Fresno-SSP

Clovis 38 25 56 47 71 69 55

Fresno-Garland 36 26 51 51 61 62 47

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 44 30 65 56 84 83 61

Parlier

Tranquillity

Huron

Kings

Hanford 51 34 74 82 75 96 88

Corcoran 54 32 52 59 56 71 67

Tulare

Visalia-Ashland 52 41 78 78 83 95 85

Porterville

Ash Mountain-SNP

Kern

Shafter

Oildale 48 44 60 73 75 76 75

Bakersfield-Gold 50 47 63 79 81 83 85

Bakersfield-Calif 43 40 53 58 74 78 66

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

District Maximum 54 47 78 82 84 96 88
Maximum Measured
Value for This Year
 
PollutantMaximum
O3-1hr (ppb)101
O3-8hr (ppb)84
PM 10 (µg/m³)116
PM 2.5 (µg/m³)49.5
Unofficial Days Over the Federal and State Standards¹
 
Federal 2015 8-Hr Ozone 39
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 19
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 8
  Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 0
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 82
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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Saturday, August 22, 2026 Page 1 of 1