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.

05/20 05/21 05/22 05/23 05/24 05/25 05/26

San Joaquin

Stockton-Hazelton 33
33
33
35
25
31
38

Manteca

Tracy-Airport 41
40
36
40
30
35
47

Stanislaus

Modesto-14th 38
38
38
39
30
37
45

Turlock 40
39
40
40
32
41
49

Merced

Merced-Coffee 39
41
42
40
32
43
50

Madera

Madera-City 42
43
47
45
33
46
52

Madera 40
41
44
42
32
44
51

Fresno

Fresno-SSP 42
42
45
44
34
45
51

Clovis 44
44
47
46
36
43
52

Fresno-Garland 43
43
46
45
36
44
51

Fresno-Drummond 43
43
46
45
37
43
52

Parlier 49
45
48
46
41
43
53

Tranquillity 43
41
42
43
33
42
47

Huron

Kings

Hanford 50
43
46
46
40
44
51

Corcoran

Tulare

Visalia, Church 45
38
41
40
36
39
45

Porterville 59
47
51
51
43
50
54

Ash Mountain-SNP 52
45
46
50
44
32
48

Lower Kaweah-SNP

Kern

Shafter 45
43
47
47
37
43
51

Oildale 41
40
44
42
36
38
43

Bakersfield-Calif 44
41
48
47
39
42
47

Bakersfield-Muni 45
41
48
46
40
41
48

Edison 48
44
48
48
43
39
51

Arvin-DiGiorgio 52
46
51
51
46
40
53

Maricopa 46
40
45
45
40
42
48

Lebec

District Maximum 59
47
51
51
46
50
54

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) 96
PM10 State 24-hr 16
State 1-Hr Ozone 2

O3-8hr (ppb) 83
PM2.5 Federal 2006 24-hr 13
Federal 2008 8-Hr Ozone 5

PM 10 (µg/m³) 83
PM2.5 Federal 1997 24-hr 0
Federal 1997 8-Hr Ozone 0

PM 2.5 (µg/m³) 52
State 1997 8-Hr Ozone 7
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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Friday, May 27, 2016 Page 1 of 1