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.

08/25 08/26 08/27 08/28 08/29 08/30 08/31

San Joaquin

Stockton-Hazelton 49
57
68
61
47
45
50

Manteca

Tracy-Airport 36
45
50

Stanislaus

Modesto-14th 52
62
78
67
53
46
49

Turlock 62
66
79
77
66
54
54

Merced

Merced-Coffee 55
69
77
72
68
54
50

Madera

Madera-City 57
67
71
62
78
52
51

Madera 58
64
72
63
76
53
51

Fresno

Fresno-SSP 56
68
70
62
77
50
49

Clovis 63
77
85
68
84
56
55

Fresno-Garland 59
73
73
62
81
53
52

Fresno-Drummond 58
67
67
55
77
49
49

Parlier 59
68
72
58
82
63
53

Tranquillity 54
62
67
67
71
51
46

Huron

Kings

Hanford 60
64
73
71
76
57
50

Corcoran

Tulare

Visalia, Church 55
61
66
55
79
66
45

Porterville 51
58
59
50
66
61
39

Ash Mountain-SNP 69
73
73
60
81
81
57

Lower Kaweah-SNP 66
69
69
63
77
78
55

Kern

Shafter 52
63
64
56
72
54
51

Oildale 59
67
64
53
75
60
52

Bakersfield-Calif 60
69
66
60
80
61
54

Bakersfield-Muni 62
72
70
59
80
63
58

Edison 60
67
67
55
73
62
56

Arvin-DiGiorgio 65
72
75
60
77
66
55

Maricopa 61
68
71
62
73
59
50

Lebec

District Maximum 69
77
85
77
84
81
58

Maximum Measured Value for Unofficial Days Over the Federal and State Standards¹

This Year

Pollutant Maximum

PM10 Federal 24-hr 4
Federal 1-Hr Ozone 0

O3-1hr (ppb) 119
PM10 State 24-hr 109
State 1-Hr Ozone 30

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 64

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

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 92
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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Monday, September 01, 2014 Page 1 of 1