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.

07/16 07/17 07/18 07/19 07/20 07/21 07/22

San Joaquin

Stockton-Hazelton 36
41
38
46
36
39

Manteca

Tracy-Airport 40
42
45
53
43
44
40

Stanislaus

Modesto-14th 48
50
38
51
50

Turlock 61
62
61
65
57
65
63

Merced

Merced-Coffee 60
62
53
61
50
59
62

Madera

Madera-City 66
58
55
58
62
61
64

Madera 49
50
54
54
63
56
63

Fresno

Fresno-SSP 62
55
51
55
60
56
60

Clovis 66
63
58
65
72
63
65

Fresno-Garland 64
57
54
58
65
59
60

Fresno-Drummond 62
54
52
54
63
56
57

Parlier 63
54
56
59
60
58

Tranquillity 53
48
48
56
60
59

Huron

Kings

Hanford 61
53
52
56
65
59
61

Corcoran

Tulare

Visalia, Church 56
51
52
55
64
52
55

Porterville 57
53
55
53
55
53
57

Ash Mountain-SNP 76
67
73
75
74
64
71

Lower Kaweah-SNP 72
59
70
69
64
59
67

Kern

Shafter 56
51
57
60
47
60
54

Oildale 59
51
58
58
58

Bakersfield-Calif

Bakersfield-Muni 62
40
61
62
54
60
57

Edison 68
57
64
58
63
62
63

Arvin-DiGiorgio 70
62
68
54
63
65
66

Maricopa 60
53
62
57
56
57
61

Lebec

District Maximum 76
67
73
75
74
65
71

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 83
State 1-Hr Ozone 17

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 43

PM 10 (µg/m³) 176
PM2.5 Federal 1997 24-hr 12
Federal 1997 8-Hr Ozone 17

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 65
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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Wednesday, July 23, 2014 Page 1 of 1