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.

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

San Joaquin

Stockton-Hazelton 16
39
37
26
27
30
31

Manteca

Tracy-Airport 18
50
46
33
31
34
39

Stanislaus

Modesto-14th 14
42
39
26
28
26
30

Turlock 17
40
42
30
26
33
32

Merced

Merced-Coffee 13
41
48
36
21
34
33

Madera

Madera-City 14
50
37
20
30
36

Madera 10
46
36
21
25
34

Fresno

Fresno-SSP 8
47
37
18
24
34

Clovis 8
47
37
24
30
20

Fresno-Garland 6
43
32
19
20
30

Fresno-Drummond 5
43
32
22
24
28

Parlier 11
46
38
26
26
32

Tranquillity 24
50
40
34
32
37

Huron

Kings

Hanford 13
43
36
22
15
22

Corcoran

Tulare

Visalia, Church 6
35
32
18
21
20

Porterville 14
34
48
38
29
20
25

Ash Mountain-SNP 28
44
37
27
32
35

Lower Kaweah-SNP 34
42
53
38
38
38
35

Kern

Shafter 13
43
35
13
17
21

Oildale 17
45
36
20
28
22

Bakersfield-Calif 9
5
28
34
20
20
15

Bakersfield-Muni 14
44
31
25
24

Edison 31

Arvin-DiGiorgio 18
47
38
31
33
28

Maricopa 16
50
38
26
27
40

Lebec

District Maximum 34
50
53
40
38
38
40

Maximum Measured Unofficial Days Over the Federal and State Standards¹

Value for This Year

Pollutant Maximum

PM10 Federal 24-hr 6
Federal 1-Hr Ozone 0

O3-1hr (ppb) 123
PM10 State 24-hr 177
State 1-Hr Ozone 48

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 45
Federal 2008 8-Hr Ozone 91

PM 10 (µg/m³) 202
PM2.5 Federal 1997 24-hr 17
Federal 1997 8-Hr Ozone 37

PM 2.5 (µg/m³) 98
State 1997 8-Hr Ozone 127
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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Wednesday, December 17, 2014 Page 1 of 1