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.

08/24 08/25 08/26 08/27 08/28 08/29 08/30

San Joaquin

Stockton-Hazelton 54
49
48
36
40
29
38

Manteca

Tracy-Airport 55
53
55
46
46
33
45

Stanislaus

Modesto-14th 53
47
64
32
46

Turlock 60
62
56
49
63
34
46

Merced

Merced-Coffee 55
63
55
51
55
36
47

Madera

Madera-City 56
59
60
35
47

Madera 58
43
52
64
38
52

Fresno

Fresno-SSP 61
61
57
54
69
35
47

Clovis 69
67
57
63
78
36
46

Fresno-Garland 65
65
57
63
75
35
46

Fresno-Drummond 61
62
55
57
69
33
45

Parlier 73
78
79
79
40
48

Tranquillity 56
44
51
34
45

Huron

Kings

Hanford 61
64
63
55
55
36
45

Corcoran

Tulare

Visalia, Church 68
60
74
80
57
41
45

Porterville 69
57
73
70
55
48
47

Ash Mountain-SNP 82
71
77
79
66
57

Lower Kaweah-SNP 78
70
73
74
62
55
47

Kern

Shafter 62
52
61
54
55
42
45

Oildale 69
61
52
56
44
45

Bakersfield-Calif 71
61
61
53
61
46
47

Bakersfield-Muni 75
70
63
55
65
46
49

Edison 74
66
44
49

Arvin-DiGiorgio 78
66
63
63
72
52
53

Maricopa 67
66
61
56
59
42
41

Lebec

District Maximum 82
78
79
80
79
57
53

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

Year

Pollutant Maximum

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

O3-1hr (ppb) 115
PM10 State 24-hr 47
State 1-Hr Ozone 28

O3-8hr (ppb) 101
PM2.5 Federal 2006 24-hr 36
Federal 2008 8-Hr Ozone 61

PM 10 (µg/m³) 130
PM2.5 Federal 1997 24-hr 5
Federal 1997 8-Hr Ozone 22

PM 2.5 (µg/m³) 99
State 1997 8-Hr Ozone 75
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, August 31, 2015 Page 1 of 1