Daily Report

Ozone Eight-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 53 58 52 66 64 53 55

Manteca

Tracy-Airport 64 64 66 68 67 62 61

Stanislaus

Modesto-14th 72x 69 61 81x 79x 60 65

Turlock 68 78x 66 76x 75x 66 67

Merced

Merced-M St.

Merced-Vierra 64 70 66 73x 73x 71 69

Madera

Madera-City 65 70 61 73x 68 70 71

Madera 63 68 60 77x 68 75 69

Fresno

Fresno-SSP 64 76x 64 75 70 67

Clovis 65 75x 71x 78 75x 68 81

Fresno-Garland 62 71x 64 70 67 65 72

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 61 73x 71x 75 70 64 73

Parlier 62 69 75x 77 73x 69 76

Tranquillity 57 64 59 65 61 62 58

Huron

Kings

Hanford 63 71x 77x 78 73 71 66

Corcoran

Tulare

Visalia-Ashland 81x 78 76 80 77

Porterville 62 69 75x 75 70 75 75

Ash Mountain-SNP 61 62 58 61 61 59 71

Kern

Shafter 59 68 74x 84 60 70

Oildale 62 74x 84x 80 79 69 80

Bakersfield-Gold

Bakersfield-Calif 56 71x 76x 72 62 58 70

Bakersfield-Muni 53 70 73x 70 62 57 68

Edison 59 73x 81x 78 65 66 75

Arvin-DiGiorgio 58 62 76x 75 54 61 70

Maricopa 60 67 73x 80 63 60 68

Lebec

District Maximum 72 78 84 84 79 80 81
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