Daily Report

Ozone Eight-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 48 49 40 38 35 35 34

Manteca

Tracy-Airport 59 60 54 45 40 42 37

Stanislaus

Modesto-14th 57 59 56 46 41 40 37

Turlock 60 65 61 50 43 40 36

Merced

Merced-M St.

Merced-Vierra 63 71 60 45 41 43 38

Madera

Madera-City 72 79 69 45 42 43 39

Madera 72 78 69 44 41 41 40

Fresno

Fresno-SSP 76 79 70 45 42 41 41

Clovis 78 76 73 49 43 43 42

Fresno-Garland 72 70 66 45 40 40 39

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 78 73 64 48 41 41 41

Parlier 76 68 71 49 42 40 45

Tranquillity 56 62 55 40 40 38 35

Huron

Kings

Hanford 79 73 56 51 40 40 41

Corcoran

Tulare

Visalia-Ashland

Porterville 79 78 72 47 44 43 48

Ash Mountain-SNP 74 64 77 50 51 37 47

Kern

Shafter 62 59 49 43 40 40 41

Oildale 81 60 52 49 46 50

Bakersfield-Gold

Bakersfield-Calif 71 66 59 46 43 40 43

Bakersfield-Muni 71 73 58 45 42 36 33

Edison 83 83 68 50 48 42 48

Arvin-DiGiorgio 74 73 61 47 46 39 46

Maricopa 69 66 65 48 45 40 44

Lebec

District Maximum 83 83 77 52 51 46 50
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