Ozone Eight-Hour Maximum (PPB)

The information in this report is based on preliminary data and is subject to change. The real-time PM10/PM2.5

monitoring equipment is used for air quality forecasting and trend analysis.

09/18 09/19 09/20 09/21 09/22 09/23 09/24

San Joaquin

Stockton-Hazelton 32 35 29 37 38 37 41

Manteca

Tracy-Airport 37 40 35 37 37 36 38

Stanislaus

Modesto-14th 34 43 36 39 44 42 43

Turlock 32 43 34 39 44 39 43

Merced

Merced-Coffee 35 43 35 37 45 40 45

Madera

Madera-City 46 47 39 40 46 42 47

Madera 47 45 38 39 44 42 46

Fresno

Fresno-SSP 53 49 41 43 47 45 48

Clovis 54 45 30 36 39 46 47

Fresno-Garland 58 50 43 43 48 47 50

Fresno-Drummond 45 45 41 38 43 42 46

Parlier 59 50 49 42 45 46 50

Tranquillity 41 44 35 40 43 39 44

Huron

Kings

Hanford 53 49 44 42 46 44 50

Corcoran

Tulare

Visalia, Church 59 52 58 43 45 48 51

Porterville 56 46 49 38 41 41 48

Ash Mountain-SNP 68 51 56 43 49 53 55

Lower Kaweah-SNP 66 46 52 41 45 50 52

Kern

Shafter 58 46 48 42 44 44 53

Oildale 63 53 50 43 46 46 54

Bakersfield-Calif 64 52 55 45 50 50 58

Bakersfield-Muni 61 50 50 40 43 44 51

Edison 65 54 54 41 46 48 52

Arvin-DiGiorgio 66 48 56 41 47 50 50

Maricopa 63 44 51 39 45 49 53

Lebec

District Maximum 68
54
58
45
50
53
58

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) 113
PM10 State 24-hr 121
State 1-Hr Ozone 39

O3-8hr (ppb) 99
PM2.5 Federal 2006 24-hr 8
Federal 2008 8-Hr Ozone 78

PM 10 (µg/m³) 133
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 25

PM 2.5 (µg/m³) 51
State 1997 8-Hr Ozone 105
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, September 25, 2017 Page 1 of 1