Ozone Eight-Hour Maximum (PPB)

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

01/21 01/22 01/23 01/24 01/25 01/26 01/27

San Joaquin

Stockton-University 34 28 25 28 22 26 28

Manteca

Tracy-Airport 33 33 29 24 31 30 31

Stanislaus

Modesto-14th 34 32 30 29 34 26 30

Turlock 31 27 25 30 35 30 32

Merced

Merced-M St.

Merced-Coffee 19 28 33 33 24 38 28

Madera

Madera-City 18 26 35 32 33 37 37

Madera 18 29 35 34 38 39 41

Fresno

Fresno-SSP 15 25 34 33 30 37 38

Clovis 30 31 29 36

Fresno-Garland 12 27 28 29 26 31 32

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 9 28 31 30 26 34 35

Parlier 15 34 36 35 36 38 40

Tranquillity 27 27 29 32 38 34 41

Huron

Kings

Hanford 23 25 28 33 31 33 33

Corcoran

Tulare

Visalia, Church

Porterville 29 37 35 39 39 39 37

Ash Mountain-SNP 32 37 40 37 39 41 41

Lower Kaweah-SNP 45 46 46 43 41 42 44

Kern

Shafter 23 28 31 34 34 33 34

Oildale 21 34 35 34 38 37 37

Bakersfield-Gold

Bakersfield-Calif 21 27 28 24 27

Bakersfield-Muni 20 27 28 28 31 31

Edison 22 33 31 29 36 37 37

Arvin-DiGiorgio 28 29 37 39 38 37 39

Maricopa 34 35 39 43 47 43 44

Lebec

District Maximum 45
46
46
43
47
43
44

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

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

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

O3-1hr (ppb) 51
Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 0

O3-8hr (ppb) 48
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 0

PM 10 (µg/m³) 79
Federal 2006 24-hr PM2.5 15
State 24-hr PM10 11

PM 2.5 (µg/m³) 53.9
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, January 28, 2022 Page 1 of 1