Daily Report

Ozone Eight-Hour Maximum (PPB)

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

10/22 10/23 10/24 10/25 10/26 10/27 10/28

San Joaquin

Stockton-University 22 35 31 43 35 34 25

Manteca

Tracy-Airport 29 41 39 48 41 39 35

Stanislaus

Modesto-14th 32 36 36 48 42 39 37

Turlock 35 47 42 38

Merced

Merced-M St.

Merced-Vierra 36 31 35 45 44 39

Madera

Madera-City 36 31 38 46 45 38

Madera 37 29 38 45 43 36

Fresno

Fresno-SSP 37 32 39 49 47 40 38

Clovis 36 34 42 49 46 42 38

Fresno-Garland 33 31 40 43 43 38 35

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 46 41 37

Parlier 33 38 44 43 39 38

Tranquillity 34 28 39 44 41 38 40

Huron

Kings

Hanford 31 30 38 40 47 41 41

Corcoran

Tulare

Visalia-Ashland 32 32 36 48 47 41 43

Porterville 34 26 39 46 45 39 41

Ash Mountain-SNP 32 31 38 45 49

Kern

Shafter 36 29 42 47 53 40 42

Oildale 43 34 49 54 58 49 48

Bakersfield-Gold

Bakersfield-Calif 36 29 42 47 51 41 43

Bakersfield-Muni 36 26 43 44 51 40 41

Edison 38 26 45 46 49 44 45

Arvin-DiGiorgio 36 25 40 46 48 44 42

Maricopa 37 34 46 54 55 47 47

Lebec

District Maximum 43 41 49 54 58 49 49
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 53
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 29
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 15
  Federal 1-Hr Ozone 0
State 2005 8-Hr Ozone 53
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 141
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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Thursday, October 29, 2026 Page 1 of 1