Daily Report

Ozone One-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 28 39 39 51 39 37 36

Manteca

Tracy-Airport 33 46 44 57 45 43 40

Stanislaus

Modesto-14th 37 45 44 55 47 44 43

Turlock 43 55 48 43

Merced

Merced-M St.

Merced-Vierra 42 41 42 53 50 43 46

Madera

Madera-City 41 33 45 52 53 45

Madera 42 34 47 54 53 44

Fresno

Fresno-SSP 40 36 47 58 53 45 44

Clovis 41 37 51 57 52 46 45

Fresno-Garland 38 34 49 52 49 43 41

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 54 48 43

Parlier 38 45 52 52 51 46

Tranquillity 39 35 46 53 50 44 45

Huron

Kings

Hanford 41 36 45 51 57 49 47

Corcoran

Tulare

Visalia-Ashland 42 37 46 56 54 50 50

Porterville 43 32 47 53 56 47 49

Ash Mountain-SNP 39 35 45 52 54

Kern

Shafter 41 32 49 56 62 49 50

Oildale 49 37 56 61 67 57 56

Bakersfield-Gold

Bakersfield-Calif 42 33 49 54 61 50 48

Bakersfield-Muni 42 31 49 52 59 49 48

Edison 46 30 56 57 64 53 54

Arvin-DiGiorgio 44 32 48 56 63 53 53

Maricopa 40 37 51 61 62 52 52

Lebec

District Maximum 49 46 56 61 67 57 56
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