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.

07/22 07/23 07/24 07/25 07/26 07/27 07/28

San Joaquin

Stockton-Hazelton 40
47
61
65
53
61

Manteca

Tracy-Airport 40
40
48
61
69
55
63

Stanislaus

Modesto-14th 50
45
53
69
76
63
68

Turlock 63
56
62
77
82
70
64

Merced

Merced-Coffee 62
48
59
70
77
68
58

Madera

Madera-City 64
49
61
68
81
74
64

Madera 63
48
62
68
79
75
60

Fresno

Fresno-SSP 60
46
59
67
80
74
62

Clovis 65
52
65
79
84
83
67

Fresno-Garland 60
49
61
74
83
82
64

Fresno-Drummond 57
48
60
66
81
78
61

Parlier 58
53
65
70
82
78
53

Tranquillity 59
47
57
65
76
66
54

Huron

Kings

Hanford 61
48
55
65
74
73
63

Corcoran

Tulare

Visalia, Church 55
51
57
61
74
72
54

Porterville 57
52
54
60
64
62
45

Ash Mountain-SNP 71
66
78
79
83
81
66

Lower Kaweah-SNP 67
62
73
74
79
78
64

Kern

Shafter 54
54
56
74
74
67
64

Oildale 58
73
73
67
60

Bakersfield-Calif 63
76
78
73
67

Bakersfield-Muni 57
50
62
82
80
77
67

Edison 63
59
72
81
73
71
61

Arvin-DiGiorgio 66
62
71
86
76
73
59

Maricopa 61
53
54
71
70
69
63

Lebec

District Maximum 71
66
78
86
84
83
68

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 0

O3-1hr (ppb) 119
PM10 State 24-hr 86
State 1-Hr Ozone 20

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 47

PM 10 (µg/m³) 176
PM2.5 Federal 1997 24-hr 12
Federal 1997 8-Hr Ozone 18

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 69
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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Tuesday, July 29, 2014 Page 1 of 1