Daily Report

Ozone One-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 50 55 50 53 52 61

Manteca

Tracy-Airport 53 56 59 48 55 53 59

Stanislaus

Modesto-14th 66 68 70 61 70 72 76

Turlock 71 67 70 65 74 81 77

Merced

Merced-M St.

Merced-Vierra 70 67 63 62 73 71 76

Madera

Madera-City 78x 73 70 65 74 59 68

Madera 76x 73 66 71 71 56 68

Fresno

Fresno-SSP 81x 79 67 73 67 68 68

Clovis 91x 95x 75 85x 94x 87x 76

Fresno-Garland 77x 77x 68 74 71 74 74

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 82x 83x 68 75 71 70 71

Parlier 83x 94x 78 71 80 75 61

Tranquillity 69 68 63 71 63 59 64

Huron

Kings

Hanford 77x 73 70 68 79x 65 68

Corcoran

Tulare

Visalia-Ashland 84x

Porterville 90x 80x 82x 77 78x 70 59

Ash Mountain-SNP 94x 92x 81x 81x 92x 76x 63

Kern

Shafter 88x 74 78 74 79 66 58

Oildale 59

Bakersfield-Gold

Bakersfield-Calif 82x 74 70 69 69 62 54

Bakersfield-Muni 74 79x 74 73 69 76 57

Edison 81x 85x 99x 87x 82 93x 73

Arvin-DiGiorgio 84x 83x 86x 79x 70 80 68

Maricopa 81x 79x 67 73 74 69 60

Lebec

District Maximum 94 95 99 87 94 93 77
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