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.

03/22 03/23 03/24 03/25 03/26 03/27 03/28

San Joaquin

Stockton-Hazelton 38
48
40
36
53
47
47

Manteca

Tracy-Airport 46
52
47
41
52
54
56

Stanislaus

Modesto-14th 41
50
43
38
53
58
50

Turlock 39
53
42
40
53
63
49

Merced

Merced-Coffee 36

Madera

Madera-City 47
51
46
46
56
63
51

Madera 37
50
46
46
55
59
49

Fresno

Fresno-SSP 50
50
46
49
58
61
50

Clovis 49
49
44
50
59
64
50

Fresno-Garland 50
49
45
48
56
61
50

Fresno-Drummond 52
50
43
49
57
65
52

Parlier 53
49
46
43
64
71
63

Tranquillity 42
47
46
42
55
63
48

Huron

Kings

Hanford 49
46
45
45
57
59
50

Corcoran

Tulare

Visalia, Church 51
45
43
43
56
59
60

Porterville 45
41
41
40
49
52
47

Ash Mountain-SNP 60
41
30
45
49
58
61

Lower Kaweah-SNP 59
36
40
36
44
53
59

Kern

Shafter 45
43
45
42
54
59
45

Oildale 43
43
45
42
51
56
44

Bakersfield-Calif 49
44
43
48
57
63
48

Bakersfield-Muni 52
45
50
53
59
66
52

Edison 49
41
46
49
54
64
51

Arvin-DiGiorgio 52
42
49
50
57
63
54

Maricopa 52
45
49
46
61
64
52

Lebec

District Maximum 60
53
50
53
64
71
63

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) 83
PM10 State 24-hr 15
State 1-Hr Ozone 0

O3-8hr (ppb) 71
PM2.5 Federal 2006 24-hr 30
Federal 2008 8-Hr Ozone 0

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 1
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, March 29, 2015 Page 1 of 1