Daily Report

Ozone Eight-Hour Maximum (PPB)

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

10/02 10/03 10/04 10/05 10/06 10/07 10/08

San Joaquin

Stockton-University 52 66 64 53 55 48 49

Manteca

Tracy-Airport 66 68 67 62 61 59 60

Stanislaus

Modesto-14th 61 81x 79x 60 65 57 59

Turlock 66 76x 75x 66 67 60 65

Merced

Merced-M St.

Merced-Vierra 66 73x 73x 71 69 63 71

Madera

Madera-City 61 73x 68 70 71 72 79

Madera 60 77x 68 75 69 72 78

Fresno

Fresno-SSP 64 75 70 67 76 79

Clovis 71x 78 75x 68 81 78 76

Fresno-Garland 64 70 67 65 72 72 70

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 71x 75 70 64 73 78 73

Parlier 75x 77 73x 69 76 76 68

Tranquillity 59 65 61 62 58 56 62

Huron

Kings

Hanford 77x 78 73 71 66 79 73

Corcoran

Tulare

Visalia-Ashland 81x 78 76 80 77

Porterville 75x 75 70 75 75 79 78

Ash Mountain-SNP 58 61 61 59 71 74 64

Kern

Shafter 74x 84 60 70 62 59

Oildale 84x 80 79 69 80 81

Bakersfield-Gold

Bakersfield-Calif 76x 72 62 58 70 71 66

Bakersfield-Muni 73x 70 62 57 68 71 73

Edison 81x 78 65 66 75 83 83

Arvin-DiGiorgio 76x 75 54 61 70 74 73

Maricopa 73x 80 63 60 68 69 66

Lebec

District Maximum 84 84 79 80 81 83 83
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 52
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 28
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 52
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 128
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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Friday, October 9, 2026 Page 1 of 1