Daily Report

Ozone One-Hour Maximum (PPB)

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

06/26 06/27 06/28 06/29 06/30 07/01 07/02

San Joaquin

Stockton-University 27 38 40 46 46 47 45

Manteca

Tracy-Airport 41 39 36 40 46 42 47

Stanislaus

Modesto-14th 35 43 44 46 56 59 65

Turlock 37 43 44 46 59 60 63

Merced

Merced-M St.

Merced-Vierra 42 45 42 49 50 51 66

Madera

Madera-City 43 48 45 53 51 54 64

Madera 48 48 46 54 50 55 58

Fresno

Fresno-SSP 48 47 47 53 51 53 56

Clovis 52 47 51 52 64 55 60

Fresno-Garland 52 47 48 53 50 55

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 56 47 51 53 56 55 57

Parlier 58 45 52 49 63 56 60

Tranquillity 41 41 43 51 46 53 54

Huron

Kings

Hanford 49 43 51 49 49 59 58

Corcoran

Tulare

Visalia-Ashland 60 44 54 49 62 61 63

Porterville 62 43 54 54 56 59 67

Ash Mountain-SNP 65 43 56 56 67 68 68

Kern

Shafter 60 47 54 56 52 47 56

Oildale 63 49 56 55 58 51 57

Bakersfield-Gold

Bakersfield-Calif 60 45 53 54 54 50 56

Bakersfield-Muni 57 46 52 51 52 49 53

Edison 66 53 60 59 59 59 61

Arvin-DiGiorgio 58 47 53 56 53 56 58

Maricopa 52 40 50 52 51 56 59

Lebec

District Maximum 66 53 60 59 67 68 68
Maximum Measured
Value for This Year
 
PollutantMaximum
O3-1hr (ppb)98
O3-8hr (ppb)84
PM 10 (µg/m³)94
PM 2.5 (µg/m³)49.5
Unofficial Days Over the Federal and State Standards¹
 
Federal 2015 8-Hr Ozone 22
Federal 1997 24-Hr PM2.5 0
  Federal 2008 8-Hr Ozone 9
Federal 24-Hr PM10 0
  Federal 1997 8-Hr Ozone 3
State 1-Hr Ozone 4
  Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 3
  Federal 2006 24-Hr PM2.5 14
State 24-Hr PM10 48
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, July 3, 2026 Page 1 of 1