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.

08/13 08/14 08/15 08/16 08/17 08/18 08/19

San Joaquin

Stockton-Hazelton 32
45
52
53
52
49
46

Manteca

Tracy-Airport 36
40
56
57
53
55
44

Stanislaus

Modesto-14th 38
50
61
62
57
58
53

Turlock 47
56
68
71
61
65
61

Merced

Merced-Coffee 51
56
68
68
60
65
56

Madera

Madera-City 53
53
65
65
64
59
57

Madera 54
49
63
65
64
61
55

Fresno

Fresno-SSP 52
51
64
67
66
58
55

Clovis 57
62
78
71
78
67
62

Fresno-Garland 55
56
68
67
72
62
57

Fresno-Drummond 50
50
62
62
67
56
52

Parlier 53
53
67

Tranquillity 51
50
59
61
57
61

Huron

Kings

Hanford 49
53
65
69
63
60
55

Corcoran

Tulare

Visalia, Church 45
49
63
63
66
57
53

Porterville 40
52
52
55
54
46

Ash Mountain-SNP 57
63
65
70
78
67
71

Lower Kaweah-SNP 55
62
62
69
76
66
70

Kern

Shafter 47
49
58
64
62
61
44

Oildale 51
53
62
63
59
62
49

Bakersfield-Calif 56
56
64
68
64
67
52

Bakersfield-Muni 62
62
68
71
66
69
56

Edison 61
25
63
66
65
64
54

Arvin-DiGiorgio 70
66
64
69
66
70

Maricopa 55
49
59
62
66
64
55

Lebec

District Maximum 70
66
78
71
78
70
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 100
State 1-Hr Ozone 29

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 59

PM 10 (µg/m³) 176
PM2.5 Federal 1997 24-hr 12
Federal 1997 8-Hr Ozone 23

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 85
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, August 20, 2014 Page 1 of 1