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.

06/18 06/19 06/20 06/21 06/22 06/23 06/24

San Joaquin

Stockton-Hazelton 47
63
60
53
48

Manteca

Tracy-Airport 53
71
76
66
66
68
52

Stanislaus

Modesto-14th 65
62
72
76
69
69
63

Turlock 56
74
69
78
72
76
67

Merced

Merced-Coffee 52
57
54
70
74
72
62

Madera

Madera-City 62
67
58
68
71
83
73

Madera 56
62
62
63
72
80
68

Fresno

Fresno-SSP 66
69
69
74
86
76

Clovis 75
67
78
75
86
95
89

Fresno-Garland 74
67
73
72
82
95
90

Fresno-Drummond 68
69
73
69
86
97
79

Parlier 65
82
82
81
87
99
82

Tranquillity 48
60
59
63
72
71
65

Huron

Kings

Hanford 53
69
66
69
79
83
69

Corcoran

Tulare

Visalia, Church 69
82
85
79
80
68

Porterville 74
81
80
78
90
89
70

Ash Mountain-SNP 73
75
83
79
86
92
78

Lower Kaweah-SNP 58
69
79
77
80
85
66

Kern

Shafter 75
78
69
71
79
80
69

Oildale 73
78
74
85
71

Bakersfield-Calif 76
75
72
77
84
87
76

Bakersfield-Muni 72
71
69
75
81
81
75

Edison 71
74
73
74
81
80
76

Arvin-DiGiorgio 71
71
71
73
78
84
76

Maricopa 67
66
67
67
70
77
71

Lebec

District Maximum 76
82
85
81
90
99
90

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24- 0
Federal 1-Hr 0

O3-1hr (ppb) 113
PM10 State 24-hr 42
State 1-Hr Ozone 12

O3-8hr (ppb) 99
PM2.5 Federal 2006 24-hr 7
Federal 2008 8-Hr 22

PM 10 (µg/m³) 92
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr 8

PM 2.5 (µg/m³) 50
State 1997 8-Hr Ozone 32
¹Some of the days over the standards shown above may be the result of “Natural Events” such as
extreme wind episodes, or “Exceptional Events” such as wildfires and would not count as violations of
the federal standard.
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Sunday, June 25, 2017 Page 1 of 1