Ozone One-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.

09/19 09/20 09/21 09/22 09/23 09/24 09/25

San Joaquin

Stockton-Hazelton 41 32 41 44 43 47 50

Manteca

Tracy-Airport 43 37 41 41 39 42 47

Stanislaus

Modesto-14th 47 38 43 48 47 46 59

Turlock 47 37 43 49 45 44 59

Merced

Merced-Coffee 47 40 41 48 43 50

Madera

Madera-City 50 42 43 50 46 55 58

Madera 49 41 41 49 45 52 55

Fresno

Fresno-SSP 53 44 45 52 50 51 55

Clovis 50 38 42 49 51 49 60

Fresno-Garland 56 47 45 53 52 52 60

Fresno-Drummond 49 44 41 47 46 48 54

Parlier 57 55 46 51 54 55 61

Tranquillity 48 39 43 45 42 51 51

Huron

Kings

Hanford 56 49 44 49 50 53 63

Corcoran

Tulare

Visalia, Church 58 67 46 49 52 54 63

Porterville 51 54 41 45 43 50 57

Ash Mountain-SNP 53 60 49 53 55 59 65

Lower Kaweah-SNP 49 57 45 46 53 56 61

Kern

Shafter 49 50 43 47 46 55 60

Oildale 65 53 45 48 48 56 61

Bakersfield-Calif 54 60 49 52 54 60 64

Bakersfield-Muni 55 54 44 47 49 54 57

Edison 68 58 46 49 51 56 63

Arvin-DiGiorgio 58 62 47 53 54 55 64

Maricopa 46 55 43 48 51 57 61

Lebec

District Maximum 68
67
49
53
55
60
65

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 122
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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Tuesday, September 26, 2017 Page 1 of 1