Ozone Eight-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 24 11 21 11 31 27 21

Manteca

Tracy-Airport 30 21 28 18 39 33 33

Stanislaus

Modesto-14th 27 20 28 21 37 32 33

Turlock 27 21 23 21 33 30 31

Merced

Merced-Coffee 27 25 19 23 30 31 31

Madera

Madera-City 32 28 21 30 30 25 34

Madera 29 26 22 28 29 23 31

Fresno

Fresno-SSP 29 25 23 26 29 19 31

Clovis 31 24 20 28 30 32

Fresno-Garland 26 20 16 23 26 15 29

Fresno-Drummond 30 22 17 27 29 18 30

Parlier 35 27 19 26 28 22 31

Tranquillity 30 30 24 26 28 31 33

Huron

Kings

Hanford 31 25 18 26 27 20 30

Corcoran

Tulare

Visalia, Church 34 25 15 22 24 22 23

Porterville 36 23 17 25 22 30 27

Ash Mountain-SNP 37 31 25 23 24 29 27

Lower Kaweah-SNP 31 39 34 37 31 36 38

Kern

Shafter 38 27 14 34 28 37 27

Oildale 37 23 17 31 25

Bakersfield-Calif 31 20 12 28 22 31 22

Bakersfield-Muni 32 19 11 27 20 29 19

Edison 40 26 20 30 26 36 24

Arvin-DiGiorgio

Maricopa 38 35 28 34 35 41 32

Lebec

District Maximum 40
39
34
37
39
41
38

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