Ozone One-Hour Maximum (PPB)

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

04/22 04/23 04/24 04/25 04/26 04/27 04/28

San Joaquin

Stockton-University 50 44 46 39 36 43 47

Manteca

Tracy-Airport 46 36 39 34 30 35 41

Stanislaus

Modesto-14th 55 50 49 44 39 46 50

Turlock 64 44 47 46 41 46 51

Merced

Merced-M St.

Merced-Vierra 54 46 45 45 42 44 48

Madera

Madera-City 56 51 41 43 43 42 45

Madera 58 53 42 44 44 43 46

Fresno

Fresno-SSP 57 51 39 43 42 40 41

Clovis 80 57 41 45 45 41 43

Fresno-Garland 64 51 37 40 40 37 38

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 67 55 40 43 44 41 43

Parlier 64 54 44 48 47 43 45

Tranquillity 45 43 36 38 39 40 41

Huron

Kings

Hanford 57 48 45 45 44 44 45

Corcoran

Tulare

Visalia-Ashland 69 50 43 46 46 45 46

Porterville 62 50 47 48 45 45 48

Ash Mountain-SNP 60 48 34 39 39 35 39

Lower Kaweah-SNP 62 47 41 41 48 39 38

Kern

Shafter 58 49 45 45 43 50 48

Oildale 66 53 46 48 45 46 48

Bakersfield-Gold

Bakersfield-Calif 65 51 46 46 43 46 48

Bakersfield-Muni 65 48 44 44 40 43 45

Edison 79 51 47 48 45 46 51

Arvin-DiGiorgio 76 52 46 43 47 54

Maricopa 58 50 45 44 40 40 45

Lebec

District Maximum 80
57
49
48
48
50
54

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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Monday, April 29, 2024 Page 1 of 1