Daily Report

Ozone Eight-Hour Maximum (PPB)

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

08/05 08/06 08/07 08/08 08/09 08/10 08/11

San Joaquin

Stockton-University 45 50 46 47 45 48

Manteca

Tracy-Airport 49 49 56 44 48 46 50

Stanislaus

Modesto-14th 60 60 62 57 64 63 66

Turlock 64 64 64 59 67 68 69

Merced

Merced-M St.

Merced-Vierra 64 61 58 57 67 59 65

Madera

Madera-City 73x 69 61 63 69 55 63

Madera 71x 67 61 65 64 52 62

Fresno

Fresno-SSP 74x 70 63 66 63 62 64

Clovis 83x 78x 68 75x 77x 72x 67

Fresno-Garland 74x 71x 64 69 68 66 64

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 75x 75x 63 70 68 64 64

Parlier 75x 83x 68 67 69 68 57

Tranquillity 61 59 58 60 60 54 56

Huron

Kings

Hanford 72x 69 64 64 71x 62 58

Corcoran

Tulare

Visalia-Ashland 73x

Porterville 77x 73x 72x 70 72x 63 53

Ash Mountain-SNP 86x 85x 78x 76x 84x 72x 59

Kern

Shafter 75x 68 69 67 69 58 48

Oildale 55

Bakersfield-Gold

Bakersfield-Calif 72x 70 64 64 62 59 49

Bakersfield-Muni 70 71x 67 66 60 63 51

Edison 78x 82x 79x 77x 70 71x 58

Arvin-DiGiorgio 75x 73x 73x 72x 63 65 61

Maricopa 76x 75x 64 68 67 63 55

Lebec

District Maximum 86 85 79 77 84 72 69
Maximum Measured
Value for This Year
 
PollutantMaximum
O3-1hr (ppb)98
O3-8hr (ppb)84
PM 10 (µg/m³)116
PM 2.5 (µg/m³)49.5
Unofficial Days Over the Federal and State Standards¹
 
Federal 2015 8-Hr Ozone 35
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 16
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 5
  Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 0
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 73
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, August 12, 2026 Page 1 of 1