Daily Report

Ozone Eight-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 23 33 36 36 40 41 41

Manteca

Tracy-Airport 23 35 33 35 41 38 43

Stanislaus

Modesto-14th 31 40 41 42 51 52 56

Turlock 33 39 40 41 52 53 59

Merced

Merced-M St.

Merced-Vierra 36 40 41 46 47 44 60

Madera

Madera-City 39 42 43 49 47 47 56

Madera 42 42 43 49 47 47 54

Fresno

Fresno-SSP 42 41 44 48 49 47 54

Clovis 43 41 45 48 55 51 57

Fresno-Garland 43 40 44 49 48 52

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 48 42 46 48 52 50 54

Parlier 50 40 47 46 55 52 55

Tranquillity 38 35 40 46 40 43 49

Huron

Kings

Hanford 45 39 47 47 47 55 55

Corcoran

Tulare

Visalia-Ashland 54 40 49 47 55 58 57

Porterville 53 40 50 50 53 53 61

Ash Mountain-SNP 59 41 51 45 59 63 62

Kern

Shafter 54 40 49 48 49 43 50

Oildale 56 42 52 50 51 47 54

Bakersfield-Gold

Bakersfield-Calif 52 39 48 49 49 46 52

Bakersfield-Muni 50 39 46 48 47 45 51

Edison 57 47 53 55 54 54 59

Arvin-DiGiorgio 52 40 47 52 48 51 54

Maricopa 47 36 45 49 49 52 55

Lebec

District Maximum 59 47 53 55 59 63 62
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