Ozone One-Hour Maximum (PPB)

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

01/22 01/23 01/24 01/25 01/26 01/27 01/28

San Joaquin

Stockton-Hazelton 27 17 26 17 38 32 26

Manteca

Tracy-Airport 33 26 34 22 42 37 35

Stanislaus

Modesto-14th 32 23 33 28 43 36 36

Turlock 29 25 30 29 41 35 34

Merced

Merced-Coffee 29 29 26 28 35 33 35

Madera

Madera-City 34 33 27 36 36 32 39

Madera 32 32 30 33 33 31 37

Fresno

Fresno-SSP 33 32 32 32 32 23 37

Clovis 36 34 24 32 33 40

Fresno-Garland 31 27 21 26 29 19 35

Fresno-Drummond 33 31 25 31 31 24 38

Parlier 40 35 27 30 30 27 38

Tranquillity 34 33 30 33 31 36 36

Huron

Kings

Hanford 38 31 29 32 30 24 37

Corcoran

Tulare

Visalia, Church 38 33 22 26 28 28 32

Porterville 40 34 26 28 27 34 33

Ash Mountain-SNP 39 32 28 26 28 33 28

Lower Kaweah-SNP 34 42 36 39 34 37 40

Kern

Shafter 43 36 24 39 34 42 38

Oildale 40 27 20 35 30

Bakersfield-Calif 36 26 17 32 28 35 30

Bakersfield-Muni 37 24 19 32 27 33 28

Edison 43 29 24 36 28 40 34

Arvin-DiGiorgio

Maricopa 42 38 32 38 39 43 37

Lebec

District Maximum 43
42
36
39
43
43
40

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 0
Federal 1-Hr Ozone 0

O3-1hr (ppb) 49
PM10 State 24-hr 0
State 1-Hr Ozone 0

O3-8hr (ppb) 46
PM2.5 Federal 2006 24-hr 1
Federal 2008 8-Hr Ozone 0

PM 10 (µg/m³) 47
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 0

PM 2.5 (µg/m³) 39
State 1997 8-Hr Ozone 0
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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Wednesday, January 29, 2020 Page 1 of 1