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.

04/10 04/11 04/12 04/13 04/14 04/15 04/16

San Joaquin

Stockton-Hazelton 56
44
48
47
50
47
55

Manteca

Tracy-Airport 63
49
52
57
53
51
61

Stanislaus

Modesto-14th 60
47
51
56
53
50
52

Turlock 65
51
55
63
57
54
68

Merced

Merced-Coffee 57
41
46
50
47
58

Madera

Madera-City 63
47
55
66
54
66

Madera 62
47
53
66
44
52
65

Fresno

Fresno-SSP 63
48
56
67
55
45
54

Clovis 62
48
56
67
53
54
66

Fresno-Garland 61
47
54
65
52
52
65

Fresno-Drummond 64
50
56
67
54
55
67

Parlier 64
56
55
68
55
56
67

Tranquillity 63
47
51
60
53
53
62

Huron

Kings

Hanford 64
51
54
63
55
53
63

Corcoran

Tulare

Visalia, Church 61
55
50
59
53
53
60

Porterville 54
54
45
52
48
37
54

Ash Mountain-SNP 63
68
55
66
47
59
64

Lower Kaweah-SNP 58
63
51
63
43
54
61

Kern

Shafter 60
54
48
55
55
53
61

Oildale 55
53
46
52
50
50
58

Bakersfield-Calif 62
57
52
59
56
57
64

Bakersfield-Muni 64
60
57
62
58
58
65

Edison 56
55
51
57
51
53
57

Arvin-DiGiorgio 59
59
54
59
49
55
63

Maricopa 60
56
52
62
54

Lebec

District Maximum 65
68
57
68
58
59
68

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

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

O3-1hr (ppb) 92
PM10 State 24-hr 19
State 1-Hr Ozone 0

O3-8hr (ppb) 76
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 1

PM 10 (µg/m³) 125
PM2.5 Federal 1997 24-hr 5
Federal 1997 8-Hr Ozone 0

PM 2.5 (µg/m³) 99
State 1997 8-Hr Ozone 2
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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Friday, April 17, 2015 Page 1 of 1