Ozone One-Hour Maximum (PPB)

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

09/10 09/11 09/12 09/13 09/14 09/15 09/16

San Joaquin

Stockton-Hazelton 40 57 60 58 60 51 48

Manteca

Tracy-Airport 35 52 60 66 72 54 58

Stanislaus

Modesto-14th 57 57 64 71 72 63 62

Turlock 58 61 66 79 79 67 63

Merced

Merced-M St.

Merced-Coffee 57 61 61 69 74 62 65

Madera

Madera-City 65 61 62 76 84 68 67

Madera 60 55 58 69 82 64 65

Fresno

Fresno-SSP 60 53 59 68 87 68 79

Clovis 62 56 66 75 78 80 89

Fresno-Garland 90 54 61 72 82 71 82

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 61 63 73 88 92 80 98

Parlier 61 66 79 78 87 72 96

Tranquillity 56 51 54 65 66 60

Huron

Kings

Hanford 55 54 57 67 80 67 69

Corcoran

Tulare

Visalia, Church 65 69 78 77 87 75 84

Porterville 65 68 71 72 81 80

Ash Mountain-SNP 85 69 77 65

Lower Kaweah-SNP 82 65 69 58 97

Kern

Shafter 58 52 64 65 71 66 63

Oildale 66 74 69 68 79 72 70

Bakersfield-Gold

Bakersfield-Calif 56 59 57 60 66 64 59

Bakersfield-Muni 61 68 67 60 71 70 62

Edison 72 84 81 70 85 79 78

Arvin-DiGiorgio 74 80 75 66 85 81 77

Maricopa 59 51 56 68 75

Lebec

District Maximum 90
84
81
88
97
81
98

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 93
Federal 1997 24-hr PM2.5 0

Federal 2008 8-Hr Ozone 70
Federal 24-hr PM10 0

O3-1hr (ppb) 116
Federal 1997 8-Hr Ozone 16
State 1-Hr Ozone 36

O3-8hr (ppb) 100
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 93

PM 10 (µg/m³) 149
Federal 2006 24-hr PM2.5 15
State 24-hr PM10 148

PM 2.5 (µg/m³) 63.5
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, September 17, 2021 Page 1 of 1