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.

09/07 09/08 09/09 09/10 09/11 09/12 09/13

San Joaquin

Stockton-Hazelton 61
56
50
59
71
63
53

Manteca

Tracy-Airport 64
60
61
58
82
65
59

Stanislaus

Modesto-14th 68
59
54
61
76
71
65

Turlock 75
64
59
69
83
76
69

Merced

Merced-Coffee 71
58
57
72
79
79
76

Madera

Madera-City 72
51
59
70
75
82
89

Madera 72
51
59
73
78
86
97

Fresno

Fresno-SSP 71
58
59
75
75
91
101

Clovis 83
63
66
78
85
97
98

Fresno-Garland 76
61
79
87
80

Fresno-Drummond 67
57
56
76
72
89
93

Parlier 71
49
62
78
78
87
77

Tranquillity 65
51
55
60
71
67
61

Huron

Kings

Hanford 64
62
54
70
75
94
72

Corcoran

Tulare

Visalia, Church 68
54
56
70
76
76
67

Porterville 62
47
57
58
69
67
50

Ash Mountain-SNP 67
58
70
73
84
84
70

Lower Kaweah-SNP 55
43
66
65
78
72
64

Kern

Shafter 68
58
59
73
87
79
76

Oildale 58
60
74
85
81
70

Bakersfield-Calif 71
65
81
87
80

Bakersfield-Muni 74
66
64
80
95
88
80

Edison 72
60
61
74
86
85

Arvin-DiGiorgio 76
65
66
76
89
88
75

Maricopa 69
64
61
71
80
81
74

Lebec

District Maximum 83
66
70
80
95
97
101

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 4
Federal 1-Hr Ozone 1

O3-1hr (ppb) 125
PM10 State 24-hr 121
State 1-Hr Ozone 38

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 74

PM 10 (µg/m³) 176
PM2.5 Federal 1997 24-hr 12
Federal 1997 8-Hr Ozone 30

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 103
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, September 14, 2014 Page 1 of 1