Ozone Eight-Hour Maximum (PPB)

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

04/19 04/20 04/21 04/22 04/23 04/24 04/25

San Joaquin

Stockton-University 44 41 42 45 42 44 37

Manteca

Tracy-Airport 42 41 34 42 35 38 31

Stanislaus

Modesto-14th 53 45 49 53 47 47 42

Turlock 58 46 50 57 43 45 44

Merced

Merced-M St.

Merced-Vierra 59 44 45 48 43 43 42

Madera

Madera-City 57 44 42 53 47 40 42

Madera 58 46 42 53 47 40 42

Fresno

Fresno-SSP 56 45 44 54 47 37 41

Clovis 54 44 48 68 53 39 43

Fresno-Garland 49 41 43 56 47 36 39

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 58 47 49 57 51 39 42

Parlier 58 54 49 61 49 41 46

Tranquillity 56 37 40 42 40 36 37

Huron

Kings

Hanford 61 49 49 55 46 43 44

Corcoran

Tulare

Visalia-Ashland 57 58 49 63 47 40 45

Porterville 55 59 48 57 48 43 46

Ash Mountain-SNP 48 49 42 53 46 33 37

Lower Kaweah-SNP 47 47 54 56 47 37 41

Kern

Shafter 59 57 46 53 46 43 44

Oildale 58 62 52 58 48 45 47

Bakersfield-Gold

Bakersfield-Calif 58 61 54 57 47 44 45

Bakersfield-Muni 55 60 54 55 45 43 42

Edison 59 65 60 64 49 46 45

Arvin-DiGiorgio 58 64 55 62 51 43

Maricopa 53 56 48 54 48 43 42

Lebec

District Maximum 61
65
60
68
53
47
47

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 1
Federal 1997 24-hr PM2.5 0

Federal 2008 8-Hr Ozone 0
Federal 24-hr PM10 0

O3-1hr (ppb) 82
Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 0

O3-8hr (ppb) 71
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 1

PM 10 (µg/m³) 72
Federal 2006 24-hr PM2.5 0
State 24-hr PM10 6

PM 2.5 (µg/m³) 32.2
¹Data affected by smoke, high winds, fireworks, and 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, April 26, 2024 Page 1 of 1