Daily Report

Ozone One-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 55 50 53 52 61 54

Manteca

Tracy-Airport 56 59 48 55 53 59 53

Stanislaus

Modesto-14th 68 70 61 70 72 76 72

Turlock 67 70 65 74 81 77 71

Merced

Merced-M St.

Merced-Vierra 67 63 62 73 71 76 66

Madera

Madera-City 73 70 65 74 59 68 62

Madera 73 66 71 71 56 68 59

Fresno

Fresno-SSP 79 67 73 67 68 68 61

Clovis 95x 75 85x 94x 87x 76 72

Fresno-Garland 77x 68 74 71 74 74 57

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 83x 68 75 71 70 71 62

Parlier 94x 78 71 80 75 61 58

Tranquillity 68 63 71 63 59 64 57

Huron

Kings

Hanford 73 70 68 79x 65 68 53

Corcoran

Tulare

Visalia-Ashland

Porterville 80x 82x 77 78x 70 59 61

Ash Mountain-SNP 92x 81x 81x 92x 76x 63 75

Kern

Shafter 74 78 74 79 66 58 60

Oildale 59 59

Bakersfield-Gold

Bakersfield-Calif 74 70 69 69 62 54 52

Bakersfield-Muni 79x 74 73 69 76 57 56

Edison 85x 99x 87x 82 93x 73 61

Arvin-DiGiorgio 83x 86x 79x 70 80 68 60

Maricopa 79x 67 73 74 69 60 61

Lebec

District Maximum 95 99 87 94 93 77 75
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