Daily Report

Ozone Eight-Hour Maximum (PPB)

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

06/25 06/26 06/27 06/28 06/29 06/30 07/01

San Joaquin

Stockton-University 37 23 33 36 36 40 41

Manteca

Tracy-Airport 38 23 35 33 35 41 38

Stanislaus

Modesto-14th 50 31 40 41 42 51 52

Turlock 54 33 39 40 41 52 53

Merced

Merced-M St.

Merced-Vierra 54 36 40 41 46 47 44

Madera

Madera-City 55 39 42 43 49 47 47

Madera 54 42 42 43 49 47 47

Fresno

Fresno-SSP 55 42 41 44 48 49 47

Clovis 58 43 41 45 48 55 51

Fresno-Garland 54 43 40 44 49 48

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 57 48 42 46 48 52 50

Parlier 61 50 40 47 46 55 52

Tranquillity 50 38 35 40 46 40 43

Huron

Kings

Hanford 59 45 39 47 47 47 55

Corcoran

Tulare

Visalia-Ashland 63 54 40 49 47 55 58

Porterville 67 53 40 50 50 53 53

Ash Mountain-SNP 71 59 41 51 45 59 63

Kern

Shafter 60 54 40 49 48 49 43

Oildale 60 56 42 52 50 51 47

Bakersfield-Gold

Bakersfield-Calif 59 52 39 48 49 49 46

Bakersfield-Muni 58 50 39 46 48 47 45

Edison 65 57 47 53 55 54 54

Arvin-DiGiorgio 58 52 40 47 52 48 51

Maricopa 61 47 36 45 49 49 52

Lebec

District Maximum 71 59 47 53 55 59 63
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 47
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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Thursday, July 2, 2026 Page 1 of 1