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.

07/17 07/18 07/19 07/20 07/21 07/22 07/23

San Joaquin

Stockton-Hazelton 63
51
55
44
47
63
65

Manteca

Tracy-Airport 55
51
49
38
48
65
70

Stanislaus

Modesto-14th 67
56
63
49
57
72
77

Turlock 73
60
66
52
59
74
78

Merced

Merced-Coffee 62
48
67
57
64
67
76

Madera

Madera-City 64
45
61
60
60
68
79

Madera 66
45
63
57
53
61
76

Fresno

Fresno-SSP 69
45
63
59
56
68
84

Clovis 64
45
61
60
55
62
86

Fresno-Garland 74
49
65
64
57
75
88

Fresno-Drummond 68
43
57
57
52
67
75

Parlier 73
55
70
68
58
76
79

Tranquillity 48
42
61
51
48
57
69

Huron

Kings

Hanford 68
52
63
59
51
63
80

Corcoran

Tulare

Visalia, Church 68
63
66
62
57
76
84

Porterville 83
69
68
58
53
72
82

Ash Mountain-SNP 85
79
80
78
84
89

Lower Kaweah-SNP 75
74
79
83
77
77
84

Kern

Shafter 75
60
65
64
50
74
82

Oildale 75
69
75
65
54
77
83

Bakersfield-Calif 83
67
79
69
56
82
86

Bakersfield-Muni 74
56
63
67
56
80
83

Edison 74
70
74
69
62
77
85

Arvin-DiGiorgio 75
67
68
76
85

Maricopa 55
47
61
64
49
70
80

Lebec

District Maximum 85
79
80
83
78
84
89

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) 113
PM10 State 24-hr 65
State 1-Hr Ozone 23

O3-8hr (ppb) 99
PM2.5 Federal 2006 24-hr 8
Federal 2008 8-Hr Ozone 45

PM 10 (µg/m³) 92
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 12

PM 2.5 (µg/m³) 51
State 1997 8-Hr Ozone 59
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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Monday, July 24, 2017 Page 1 of 1