Daily Report

Ozone One-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 61 71 82 56 60 53 55

Manteca

Tracy-Airport 73 70 72 65 66 64 64

Stanislaus

Modesto-14th 73 105x 90x 66 72 61 68

Turlock 77 85x 88x 75 79 62 75

Merced

Merced-M St.

Merced-Vierra 74 80x 82x 81 75 70 78

Madera

Madera-City 68 78x 76 79 80 83 90

Madera 69 88x 74 85 79 82 90

Fresno

Fresno-SSP 76 77 80 80 90 86

Clovis 83x 90 88x 83 95 93 82

Fresno-Garland 74 77 76 76 89 93 79

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 80x 81 81 72 83 92 82

Parlier 91x 85 85x 83 90 85 80

Tranquillity 64 69 67 75 70 65 73

Huron

Kings

Hanford 85x 83 85 83 74 90 86

Corcoran

Tulare

Visalia-Ashland 91x 87 83 91 85

Porterville 87x 82 83 84 84 91 91

Ash Mountain-SNP 64 65 71 66 79 83 68

Kern

Shafter 85x 101 65 78 67 68

Oildale 95x 83 87 76 86 91

Bakersfield-Gold

Bakersfield-Calif 83x 78 71 64 77 76 75

Bakersfield-Muni 83x 76 74 64 78 77 80

Edison 105x 87 78 77 87 97 99

Arvin-DiGiorgio 95x 93 69 73 86 85 82

Maricopa 81x 84 75 63 73 77 73

Lebec

District Maximum 105 105 90 91 95 97 99
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