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.

04/19 04/20 04/21 04/22 04/23 04/24 04/25

San Joaquin

Stockton-Hazelton 41 43 50 50 50 58 53

Manteca

Tracy-Airport 46 54 51 54 61 61

Stanislaus

Modesto-14th 48 49 61 63 69 70 65

Turlock 47 48 59 57 67 71 64

Merced

Merced-Coffee 44 44 48 48 57 59 52

Madera

Madera-City 50 51 55 60 68 74 65

Madera 48 52 55 60 69 73 64

Fresno

Fresno-SSP 53 62 62 69 73 79 76

Clovis 47 52 57 65 64 68 82

Fresno-Garland 50 60 64 70 74 75 75

Fresno-Drummond 50 63 68 67 70 82 76

Parlier 52 58 67 72 73 82 89

Tranquillity 48 54 57 63 68 71 72

Huron

Kings

Hanford 50 60 62 61 69 77 71

Corcoran

Tulare

Visalia, Church 53 60 63 62 68 71 70

Porterville 51 54 62 60 58 69 74

Ash Mountain-SNP 40 53 56 62 65 68 72

Lower Kaweah-SNP 51 45 54 58 61 64 70

Kern

Shafter 52 52 65 61 60 71 73

Oildale 55 58 67 74 68 72 78

Bakersfield-Calif 54 59 69 70 68 73 77

Bakersfield-Muni 53 60 69 72 74 73 77

Edison 52 62 68 76 73 76 80

Arvin-DiGiorgio 52 65 69 75 67 79 84

Maricopa 53 54 66 67 65 72 77

Lebec

District Maximum 55
65
69
76
74
82
89

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximu

PM10 Federal 24-hr 2
Federal 1-Hr 0

O3-1hr (ppb) 89
PM10 State 24-hr 31
State 1-Hr Ozone 0

O3-8hr (ppb) 77
PM2.5 Federal 2006 24-hr 16
Federal 2008 8-Hr 1

PM 10 178
PM2.5 Federal 1997 24-hr 4
Federal 1997 8-Hr 0

PM 2.5 103
State 1997 8-Hr Ozone 3
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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Thursday, April 26, 2018 Page 1 of 1