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.

01/19 01/20 01/21 01/22 01/23 01/24 01/25

San Joaquin

Stockton-Hazelton 9
10
17
14
11
15
17

Manteca

Tracy-Airport 19
16
24
18
20
13
16

Stanislaus

Modesto-14th 5
5
13
13
12
15
14

Turlock 8
7
15
14
15
16
16

Merced

Merced-Coffee 9
10
13
11
13
14
11

Madera

Madera-City 14
15
13
14
15
18
12

Madera 13
13
14
14
19
13

Fresno

Fresno-SSP 15
14
12
13
15
18
11

Clovis 15
15
12
14
18
15
12

Fresno-Garland 10
10
10
10
17
16
9

Fresno-Drummond 14
11
11
10
16
15
11

Parlier 17
15
15
16
18
18
17

Tranquillity 14
16
18
19
22
19
18

Huron

Kings

Hanford 11
10
14
13
10
14
11

Corcoran

Tulare

Visalia, Church 10
9
13
13
11
12
10

Porterville 16
14
15
15
11
15
13

Ash Mountain-SNP 22
12
15
22
24
33
36

Lower Kaweah-SNP 41
35
40
41
38
41
42

Kern

Shafter 13
11
15
15
13
13
16

Oildale 12
9
10
13
14
8
13

Bakersfield-Calif 12
9
14
14
12
9
15

Bakersfield-Muni 14
8
13

Edison 12
9
9
9
13
10
13

Arvin-DiGiorgio 18
15
16
15
18
16
20

Maricopa 11
12
19
15
24
23
19

Lebec

District Maximum 41
35
40
41
38
41
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) 58
PM10 State 24-hr 11
State 1-Hr Ozone 0

O3-8hr (ppb) 47
PM2.5 Federal 2006 24-hr 16
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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Monday, January 26, 2015 Page 1 of 1