Daily Report

Ozone One-Hour Maximum (PPB)

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

10/07 10/08 10/09 10/10 10/11 10/12 10/13

San Joaquin

Stockton-University 53 55 47 41 39 37 39

Manteca

Tracy-Airport 64 64 63 49 44 46 41

Stanislaus

Modesto-14th 61 68 66 51 44 44 43

Turlock 62 75 70 59 49 45 42

Merced

Merced-M St.

Merced-Vierra 70 78 71 49 46 47 42

Madera

Madera-City 83 90 80 49 45 47 44

Madera 82 90 78 48 46 45 46

Fresno

Fresno-SSP 90 86 81 50 46 44 45

Clovis 93 82 79 56 48 47 47

Fresno-Garland 93 79 73 51 44 43 44

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 92 82 72 53 45 44 46

Parlier 85 80 76 59 50 43 51

Tranquillity 65 73 61 44 42 41 39

Huron

Kings

Hanford 90 86 68 61 44 44 45

Corcoran

Tulare

Visalia-Ashland

Porterville 91 91 84 55 52 46 51

Ash Mountain-SNP 83 68 87 54 59 40 52

Kern

Shafter 67 68 57 48 44 43 44

Oildale 91 70 57 53 48 52

Bakersfield-Gold

Bakersfield-Calif 76 75 67 50 47 42 47

Bakersfield-Muni 77 80 65 51 47 40 45

Edison 97 99 78 58 55 44 53

Arvin-DiGiorgio 85 82 69 55 52 42 53

Maricopa 77 73 69 51 48 42 46

Lebec

District Maximum 97 99 87 61 59 48 53
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 53
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 29
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 15
  Federal 1-Hr Ozone 0
State 2005 8-Hr Ozone 53
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 133
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, October 14, 2026 Page 1 of 1