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.

01/10 01/11 01/12 01/13 01/14 01/15 01/16

San Joaquin

Stockton-Hazelton 33
31
22
19
13
11
19

Manteca

Tracy-Airport 44
41
33
33
28
23
28

Stanislaus

Modesto-14th 27
32
28
23
20
17
21

Turlock 31
35
28
22
19
19
22

Merced

Merced-Coffee 34
38
35
22
23
23
28

Madera

Madera-City 33
35
35
23
23
27
31

Madera 30
31
35
24
24
27
29

Fresno

Fresno-SSP 31
31
34
24
19
26
24

Clovis 34
32
31
23
24
24

Fresno-Garland 32
32
31
23
18
22
23

Fresno-Drummond 25
27
22
21
20
24
23

Parlier 35
36
35
21
24
29
26

Tranquillity 38
36
37
32
30
28
27

Huron

Kings

Hanford 32
39
35
26
28
32
29

Corcoran

Tulare

Visalia, Church 29
32
28
24
26
26

Porterville 32
42
37
22
28
27
28

Ash Mountain-SNP 35
38
36
28
15
18
26

Lower Kaweah-SNP 40
42
42
37
37
36
40

Kern

Shafter 35
41
36
30
32
31
30

Oildale 36
39
26
25
25
23

Bakersfield-Calif 33
40
27
23
25
23
23

Bakersfield-Muni 35
40
33
25
27
27
23

Edison 37
41
37
28
24
25
22

Arvin-DiGiorgio 39
42
35
31
26
25
21

Maricopa 41
44
37
34
28
30
24

Lebec

District Maximum 44
44
42
37
37
36
40

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) 48
PM10 State 24-hr 2
State 1-Hr Ozone 0

O3-8hr (ppb) 47
PM2.5 Federal 2006 24-hr 0
Federal 2008 8-Hr Ozone 0

PM 10 (µg/m³) 56
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 0

PM 2.5 (µg/m³) 28
State 1997 8-Hr Ozone 0
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, January 17, 2017 Page 1 of 1