Ozone Eight-Hour Maximum (PPB)

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

04/21 04/22 04/23 04/24 04/25 04/26 04/27

San Joaquin

Stockton-University 42 45 42 44 37 34 38

Manteca

Tracy-Airport 34 42 35 38 31 29 33

Stanislaus

Modesto-14th 49 53 47 47 42 38 42

Turlock 50 57 43 45 44 39 43

Merced

Merced-M St.

Merced-Vierra 45 48 43 43 42 40 41

Madera

Madera-City 42 53 47 40 42 40 40

Madera 42 53 47 40 42 40 42

Fresno

Fresno-SSP 44 54 47 37 41 39 37

Clovis 48 68 53 39 43 42 38

Fresno-Garland 43 56 47 36 39 37 34

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 49 57 51 39 42 40 38

Parlier 49 61 49 41 46 42 41

Tranquillity 40 42 40 36 37 37 36

Huron

Kings

Hanford 49 55 46 43 44 42 42

Corcoran

Tulare

Visalia-Ashland 49 63 47 40 45 42 41

Porterville 48 57 48 43 46 40 43

Ash Mountain-SNP 42 53 46 33 37 35 34

Lower Kaweah-SNP 54 56 47 37 41 43 37

Kern

Shafter 46 53 46 43 44 40 43

Oildale 52 58 48 45 47 42 43

Bakersfield-Gold

Bakersfield-Calif 54 57 47 44 45 40 42

Bakersfield-Muni 54 55 45 43 42 38 41

Edison 60 64 49 46 45 42 44

Arvin-DiGiorgio 55 62 51 43 38 44

Maricopa 48 54 48 43 42 39 39

Lebec

District Maximum 60
68
53
47
47
43
44

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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Sunday, April 28, 2024 Page 1 of 1