Daily Report

Ozone Eight-Hour Maximum (PPB)

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

08/06 08/07 08/08 08/09 08/10 08/11 08/12

San Joaquin

Stockton-University 50 46 47 45 48 44

Manteca

Tracy-Airport 49 56 44 48 46 50 45

Stanislaus

Modesto-14th 60 62 57 64 63 66 61

Turlock 64 64 59 67 68 69 63

Merced

Merced-M St.

Merced-Vierra 61 58 57 67 59 65 62

Madera

Madera-City 69 61 63 69 55 63 55

Madera 67 61 65 64 52 62 54

Fresno

Fresno-SSP 70 63 66 63 62 64 50

Clovis 78x 68 75x 77x 72x 67 57

Fresno-Garland 71x 64 69 68 66 64 49

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 75x 63 70 68 64 64 53

Parlier 83x 68 67 69 68 57 52

Tranquillity 59 58 60 60 54 56 49

Huron

Kings

Hanford 69 64 64 71x 62 58 49

Corcoran

Tulare

Visalia-Ashland

Porterville 73x 72x 70 72x 63 53 58

Ash Mountain-SNP 85x 78x 76x 84x 72x 59 67

Kern

Shafter 68 69 67 69 58 48 51

Oildale 55 55

Bakersfield-Gold

Bakersfield-Calif 70 64 64 62 59 49 48

Bakersfield-Muni 71x 67 66 60 63 51 49

Edison 82x 79x 77x 70 71x 58 55

Arvin-DiGiorgio 73x 73x 72x 63 65 61 54

Maricopa 75x 64 68 67 63 55 59

Lebec

District Maximum 85 79 77 84 72 69 67
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 74
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, August 13, 2026 Page 1 of 1