Daily Report

Ozone One-Hour Maximum (PPB)

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

09/30 10/01 10/02 10/03 10/04 10/05 10/06

San Joaquin

Stockton-University 56 66 61 71 82 56 60

Manteca

Tracy-Airport 74 71 73 70 72 65 66

Stanislaus

Modesto-14th 81x 81 73 105x 90x 66 72

Turlock 76 89x 77 85x 88x 75 79

Merced

Merced-M St.

Merced-Vierra 72 76 74 80x 82x 81 75

Madera

Madera-City 71 76 68 78x 76 79 80

Madera 69 76 69 88x 74 85 79

Fresno

Fresno-SSP 70 87x 76 77 80 80

Clovis 73 90x 83x 90 88x 83 95

Fresno-Garland 70 83x 74 77 76 76 89

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 66 80x 80x 81 81 72 83

Parlier 69 78 91x 85 85x 83 90

Tranquillity 62 69 64 69 67 75 70

Huron

Kings

Hanford 69 77x 85x 83 85 83 74

Corcoran

Tulare

Visalia-Ashland 74 91x 87 83 91 85

Porterville 74 75 87x 82 83 84 84

Ash Mountain-SNP 68 69 64 65 71 66 79

Kern

Shafter 64 74 85x 101 65 78

Oildale 66 83x 95x 83 87 76 86

Bakersfield-Gold

Bakersfield-Calif 61 80x 83x 78 71 64 77

Bakersfield-Muni 58 83 83x 76 74 64 78

Edison 68 88x 105x 87 78 77 87

Arvin-DiGiorgio 66 72 95x 93 69 73 86

Maricopa 65 74 81x 84 75 63 73

Lebec

District Maximum 81 90 105 105 90 91 95
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 50
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 26
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 13
  Federal 1-Hr Ozone 0
State 2005 8-Hr Ozone 50
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 126
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 7, 2026 Page 1 of 1