Daily Report

Ozone One-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 46 57 45 46 35 39 39

Manteca

Tracy-Airport 45 41 41 41 33 34 35

Stanislaus

Modesto-14th 58 56 54 53 44 46 48

Turlock 55 51 55 57 59 51 43

Merced

Merced-M St.

Merced-Vierra 44 51 55 51 65 51 47

Madera

Madera-City 49 55 55 54 66 50 48

Madera 44 52 61 53 67 50 49

Fresno

Fresno-SSP 54 45 67 55 63 52 49

Clovis 57 58 78 57 64 54 53

Fresno-Garland 51 50 78 54 59 50 49

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 54 55 78 58 62 55 52

Parlier 49 73 75 70 64 56 61

Tranquillity 37 47 53 52 55 44 41

Huron

Kings

Hanford 42 58 67 58 61 55 51

Corcoran

Tulare

Visalia-Ashland 44 76 72 62 70 61 65

Porterville 38 72 61 60 68 63 63

Ash Mountain-SNP 61 75 83 68 75 56 63

Kern

Shafter 37 69 58 64 57 55 58

Oildale 53 81 68 66 64 64 68

Bakersfield-Gold

Bakersfield-Calif 43 65 51 53 52 60 54

Bakersfield-Muni 48 72 58 59 56 60 54

Edison 52 84 69 77 67 70 68

Arvin-DiGiorgio 49 77 59 68 62 62 61

Maricopa 46 66 53 65 65 59 57

Lebec

District Maximum 61 84 83 77 75 70 68
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