Daily Report

Ozone Eight-Hour Maximum (PPB)

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

08/27 08/28 08/29 08/30 08/31 09/01 09/02

San Joaquin

Stockton-University 40 38 39 40 32 36 37

Manteca

Tracy-Airport 39 35 35 37 30 32 32

Stanislaus

Modesto-14th 46 46 46 48 41 43 43

Turlock 46 44 49 51 47 46 40

Merced

Merced-M St.

Merced-Vierra 35 47 49 46 55 44 41

Madera

Madera-City 41 48 50 48 59 45 43

Madera 35 43 53 48 61 45 44

Fresno

Fresno-SSP 47 39 58 48 58 46 44

Clovis 51 43 64 54 61 49 47

Fresno-Garland 45 41 61 49 55 45 44

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 44 43 66 54 57 48 47

Parlier 39 52 65 59 58 51 52

Tranquillity 33 42 48 45 48 42 37

Huron

Kings

Hanford 36 49 60 51 55 51 41

Corcoran

Tulare

Visalia-Ashland 38 62 66 57 65 54 56

Porterville 30 67 55 56 61 55 58

Ash Mountain-SNP 54 69 77 64 68 49 58

Kern

Shafter 32 62 51 56 54 50 50

Oildale 47 77 62 62 61 59 61

Bakersfield-Gold

Bakersfield-Calif 37 60 47 51 50 53 51

Bakersfield-Muni 42 67 53 56 53 55 51

Edison 44 78 60 65 61 63 59

Arvin-DiGiorgio 41 69 52 58 56 55 50

Maricopa 44 60 52 58 59 51 52

Lebec

District Maximum 54 78 77 65 68 63 61
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 43
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 21
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 8
  Federal 1-Hr Ozone 0
State 2005 8-Hr Ozone 43
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 93
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, September 3, 2026 Page 1 of 1