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.

10/17 10/18 10/19 10/20 10/21 10/22 10/23

San Joaquin

Stockton-Hazelton 45
42
50
38
39
38
35

Manteca

Tracy-Airport 46
47
53
44
47
45
43

Stanislaus

Modesto-14th 46
45
53
38
43
38
38

Turlock 44
45
50
39
42
39
41

Merced

Merced-Coffee 46
48
59
40
42
44
47

Madera

Madera-City 47
51
63
45
44
46
52

Madera 48
51
63
46
44
47
53

Fresno

Fresno-SSP 48
52
62
47
45
41
53

Clovis 49
55
65
55
47
48
58

Fresno-Garland 48
53
62
50
42
40
53

Fresno-Drummond 45
52
60
47
39
37
47

Parlier 51
60
68
50
49
49
63

Tranquillity

Huron

Kings

Hanford 48
53
59
50
43
44
53

Corcoran

Tulare

Visalia, Church 44
48
57
55
39
41
53

Porterville 54

Ash Mountain-SNP 61
60
62
71
48
54
61

Lower Kaweah-SNP 60
59
53
67
48
46
53

Kern

Shafter 46
53
63
54
43
47
54

Oildale 50
52
65
57
42
50
59

Bakersfield-Calif 50
56
70
58
47
53
65

Bakersfield-Muni 49
56
72
60
45
53
68

Edison 60

Arvin-DiGiorgio 52
58
67
65
43
53
63

Maricopa 55
58
68
62
46

Lebec

District Maximum 61
60
72
71
49
54
68

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 5
Federal 1-Hr Ozone 0

O3-1hr (ppb) 123
PM10 State 24-hr 154
State 1-Hr Ozone 47

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 88

PM 10 (µg/m³) 180
PM2.5 Federal 1997 24-hr 12
Federal 1997 8-Hr Ozone 37

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 123
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, October 24, 2014 Page 1 of 1