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.

04/13 04/14 04/15 04/16 04/17 04/18 04/19

San Joaquin

Stockton-Hazelton 47
48
53
45
49
44
51

Manteca

Tracy-Airport 52
58
58
54
57
56
55

Stanislaus

Modesto-14th 51
60
62
52
57
52
58

Turlock 53
66
66
55
65
58
65

Merced

Merced-Coffee 49
63
63
58
59
55
65

Madera

Madera 53
64
65
57
72

Madera-City 53
62
62
61
61
57
69

Fresno

Clovis 55
67
64
64
66
62
71

Fresno-Drummond 54
61
61
61
60
58
66

Fresno-Garland 51
59
60
58
58
54
66

Fresno-SSP 55
62
65
63
62
59
73

Huron

Parlier 57
66
65
66
65
65
69

Tranquillity 52
63
66
65
55
69

Kings

Corcoran

Hanford 52
62
64
63
62
55
63

Tulare

Ash Mountain-SNP 57
65
68
70
68
61
65

Lower Kaweah-SNP 52
59
63
65
63
57
58

Porterville 50
59
61
59
57
51
56

Visalia, Church 51
59
57
58
54
52
58

Kern

Arvin-DiGiorgio 57
60
69
72
68
59
60

Bakersfield-Calif 53
65
65
65
63
53
54

Bakersfield-Muni 54
62
65
60
67
55
55

Edison 77
73
89
85
89
72
80

Lebec

Maricopa 55
62
69
71
70
58
59

Oildale 48
58
59
57
55
47
48

Shafter 52
66
48
62
63
53
55

District Maximum 77
73
89
85
89
72
80

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 3
Federal 1-Hr Ozone 0

O3-1hr (ppb) 98
PM10 State 24-hr 47
State 1-Hr Ozone 3

O3-8hr (ppb) 89
PM2.5 Federal 2006 24-hr 28
Federal 2008 8-Hr Ozone 11

PM 10 (µg/m³) 176
PM2.5 Federal 1997 24-hr 12
Federal 1997 8-Hr Ozone 4

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 18
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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Sunday, April 20, 2014 Page 1 of 1