Ozone One-Hour Maximum (PPB)

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

04/12 04/13 04/14 04/15 04/16 04/17 04/18

San Joaquin

Stockton-University 42 53 46 42 41 48 47

Manteca

Tracy-Airport 34 49 39 36 37 43

Stanislaus

Modesto-14th 50 62 49 48 49 55 55

Turlock 43 61 51 49 53 55 55

Merced

Merced-M St.

Merced-Vierra 46 59 49 47 48 51 58

Madera

Madera-City 54 61 51 49 48 54 56

Madera 53 61 49 48 50 53 56

Fresno

Fresno-SSP 53 59 48 48 46 55 57

Clovis 60 61 47 51 47 54 69

Fresno-Garland 50 51 41 44 42 49 57

Fresno-Foundry

Fresno-Pacific

Fresno-Drummond 56 60 48 50 52 55 58

Parlier 60 62 51 54 62 70 61

Tranquillity 46 51 46 42 41 44 47

Huron

Kings

Hanford 52 59 52 52 53 58 66

Corcoran

Tulare

Visalia-Ashland 59 53 49 50 59 60 59

Porterville 68 60 56 51 59 67 63

Ash Mountain-SNP 64 51 49 42 36 44 48

Lower Kaweah-SNP 67 69 69 53 65 48 47

Kern

Shafter 68 62 53 51 59 61 62

Oildale 67 62 56 52 59 67 67

Bakersfield-Gold

Bakersfield-Calif 65 59 54 52 59 68 63

Bakersfield-Muni 62 59 54 49 56 66 60

Edison 66 60 55 53 75 70

Arvin-DiGiorgio 63 63 50 54 68 77 67

Maricopa 69 65 41 53 55 65 58

Lebec

District Maximum 69
69
69
54
68
77
70

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum Federal 2015 8-Hr Ozone 1
Federal 1997 24-hr PM2.5 0

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

O3-1hr (ppb) 82
Federal 1997 8-Hr Ozone 0
State 1-Hr Ozone 0

O3-8hr (ppb) 71
Federal 1-Hr Ozone 0
State 1997 8-Hr Ozone 1

PM 10 (µg/m³) 72
Federal 2006 24-hr PM2.5 0
State 24-hr PM10 6

PM 2.5 (µg/m³) 32.2
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, April 19, 2024 Page 1 of 1