Daily Report

PM10 24 Hour Average (µg/m³)

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

07/17 07/18 07/19 07/20 07/21 07/22 07/23

San Joaquin

Stockton-University 23 14 9 13 20 14 14

Manteca 25 18 13 20 20 28 17

Tracy-Airport 29 21 15 22 31 28 20

Stanislaus

Modesto-14th 24 18 12 18 18 19 16

Turlock 30 25 17 27 30 24 20

Merced

Merced-M St. 35 28 23 28 26 32 28

Merced-Vierra

Madera

Madera-City 38 30 27 31 31 43 27

Madera

Fresno

Fresno-SSP

Clovis 45 28 25 36 34 42 27

Fresno-Garland 36 25 24 29 33 34 22

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 53 31 29 41 46 45 27

Parlier

Tranquillity

Huron

Kings

Hanford 38 36 25 39 38 52 35

Corcoran 45 38 32 41 41 37 33

Tulare

Visalia-Ashland 47 41 34 45 46

Porterville

Ash Mountain-SNP

Kern

Shafter

Oildale 43 37 31 31 37 30 48

Bakersfield-Gold 53 40 36 39 50 37 52

Bakersfield-Calif 41 35 25 31 38 33 36

Bakersfield-Muni

Edison

Arvin-DiGiorgio

Maricopa

Lebec

District Maximum 53 41 36 45 50 52 52
Maximum Measured
Value for This Year
 
PollutantMaximum
O3-1hr (ppb)98
O3-8hr (ppb)84
PM 10 (µg/m³)94
PM 2.5 (µg/m³)49.5
Unofficial Days Over the Federal and State Standards¹
 
Federal 2015 8-Hr Ozone 29
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 12
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 3
State 1-Hr Ozone 5
  Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 3
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 58
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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Friday, July 24, 2026 Page 1 of 1