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.

11/18 11/19 11/20 11/21 11/22 11/23 11/24

San Joaquin

Stockton-Hazelton 24
17
11
22
22
27
20

Manteca

Tracy-Airport 15
20
30
28
38
30

Stanislaus

Modesto-14th 23
22
11
28
21
28
19

Turlock 23
29
16
29
23
25
20

Merced

Merced-Coffee 17
24
24
22
26

Madera

Madera-City 24
19
20
30
24
15

Madera 22
20
31
24
29

Fresno

Fresno-SSP 24
20
19
23
32
24
28

Clovis 25
16
19
32
23
26

Fresno-Garland 22
20
13
20
32
20
21

Fresno-Drummond 12
17
31
20
19

Parlier 31
30
19
24
35
26
27

Tranquillity 31
33
25
31
30
30
31

Huron

Kings

Hanford 14
25
29
22
24

Corcoran

Tulare

Visalia, Church 12
22
10
14
28
20

Porterville 32
29
20
23
35
27
27

Ash Mountain-SNP 40
40
37
29
21
22
26

Lower Kaweah-SNP 38
41
27
26
34
36

Kern

Shafter 24
27
30
22
33
29
29

Oildale 21
27
31
25
35
30
28

Bakersfield-Calif 15
25
31
25
35
32
29

Bakersfield-Muni 26
22
33
32
26

Edison 20
21

Arvin-DiGiorgio 22
29
31
24
35
30
30

Maricopa 35
37
37
33
38
37
35

Lebec

District Maximum 40
41
37
33
38
38
36

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 169
State 1-Hr Ozone 48

O3-8hr (ppb) 105
PM2.5 Federal 2006 24-hr 39
Federal 2008 8-Hr Ozone 91

PM 10 (µg/m³) 180
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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Tuesday, November 25, 2014 Page 1 of 1