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.

02/22 02/23 02/24 02/25 02/26 02/27 02/28

San Joaquin

Stockton-Hazelton 33
36
34
35
36
36
37

Manteca

Tracy-Airport 35
39
43
39
42
43
41

Stanislaus

Modesto-14th 28
30
37
37
38
39
37

Turlock 24
23
37
36
39
40
37

Merced

Merced-Coffee 15
31
31
43
41
37
36

Madera

Madera-City 26
35
37
47
51
41
41

Madera 23
34
43
50
53
42
40

Fresno

Fresno-SSP 22
33
34
50
54
42
39

Clovis 23
24
23
45
51
41
38

Fresno-Garland 32
32
44
50
41
34

Fresno-Drummond 22
35
34
50
50
43
40

Parlier 23
36
43
49
57
48
40

Tranquillity 28
37
43
47
49
43
41

Huron

Kings

Hanford 22
31
33
45
49
45
38

Corcoran

Tulare

Visalia, Church 17
30
31
40
49
44
35

Porterville 31
29
38
39
46
49
38

Ash Mountain-SNP 34
34
35
37
45
50
42

Lower Kaweah-SNP 40
39
35
36
37
41
40

Kern

Shafter 36
36
42
41
45
44
39

Oildale 36
35
36
44
50
45
37

Bakersfield-Calif 36
37
44
54
54
48
41

Bakersfield-Muni 35
35
40
26
49
41

Edison 37
33
36
43
51
45
38

Arvin-DiGiorgio 41
37
42
51
43
48
41

Maricopa 40
40
44
51
54
49
40

Lebec

District Maximum 41
40
44
54
57
50
42

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) 75
PM10 State 24-hr 13
State 1-Hr Ozone 0

O3-8hr (ppb) 65
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 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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Sunday, March 01, 2015 Page 1 of 1