Daily Report

Ozone One-Hour Maximum (PPB)

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

08/26 08/27 08/28 08/29 08/30 08/31 09/01

San Joaquin

Stockton-University 45 46 57 45 46 35 39

Manteca

Tracy-Airport 48 45 41 41 41 33 34

Stanislaus

Modesto-14th 58 58 56 54 53 44 46

Turlock 57 55 51 55 57 59 51

Merced

Merced-M St.

Merced-Vierra 51 44 51 55 51 65 51

Madera

Madera-City 62 49 55 55 54 66 50

Madera 58 44 52 61 53 67 50

Fresno

Fresno-SSP 61 54 45 67 55 63 52

Clovis 79 57 58 78 57 64 54

Fresno-Garland 79 51 50 78 54 59 50

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 87 54 55 78 58 62 55

Parlier 82 49 73 75 70 64 56

Tranquillity 54 37 47 53 52 55 44

Huron

Kings

Hanford 67 42 58 67 58 61 55

Corcoran

Tulare

Visalia-Ashland 84x 44 76 72 62 70 61

Porterville 77 38 72 61 60 68 63

Ash Mountain-SNP 72 61 75 83 68 75 56

Kern

Shafter 52 37 69 58 64 57 55

Oildale 84 53 81 68 66 64 64

Bakersfield-Gold

Bakersfield-Calif 60 43 65 51 53 52 60

Bakersfield-Muni 82 48 72 58 59 56 60

Edison 87 52 84 69 77 67 70

Arvin-DiGiorgio 79 49 77 59 68 62 62

Maricopa 54 46 66 53 65 65 59

Lebec

District Maximum 87 61 84 83 77 75 70
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 92
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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Wednesday, September 2, 2026 Page 1 of 1