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Bay Area Air Quality
Management District


 
Spare the Air Air Quality Meteorology Contact Us   Data Display System 
SMTWTFS
293012345
6789101112
13141516171819
20212223242526
272829303112
3456789
Measurement:
2012: Daily(Exceedances)
StationState: 1Hr
District0
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Daily Monthly Annual   Air Quality 
Ozone:    units:
Hourly Average Values and 24-hour changes
Raw data:Unchecked data that may contain errors
Station:Monday, May 21, 2012, Ending Hour (PST)Daily Max*
1234567891011121314151617181920212223241Hr8Hr
North Counties:
Napa 25
-5
24.2
+5
25.3
+15
15.9
+4
14.7
+3
14.3
-8
15.6
-16
20.4
-15
26
-15
29.7
-12
32.3
-13
32.321
San Rafael 27.4
-13
26.6
-10
26.5
-5
25.8
+3
24.7
+6
23.5
-3
25.4
-10
25.3
-13
23.2
-15
22.9
-16
24.2
-21
27.426
Santa Rosa 18.9
-3
19
-6
18
-8
17.2
-11
15.5
-4
12.7
-11
12.6
-13
15.9
-13
19.1
-14
21.6
-14
21.8
-12
21.817
Vallejo 25
-5
25.1
-10
25.7
-9
22.9
-8
22.7
-13
23.3
-12
24.4
-10
24.1
-11
27.2
-12
28
-15
27.5
-18
2825
Coast & Central Bay:
Oakland 23
+2
22.6
-7
22.3
-6
21.9
-5
18.7
-2
18.7
-10
18.4
-12
20.6
-17
21.9
-19
22
-17
2321
Oakland West 22.6
-14
23.7
-16
22.3
-15
19.4
-3
16.1
-15
10.7
-26
11.4
-28
16.2
-23
18.7
-20
19.8
-20
21.5
-14
23.720
San Francisco 27.1
-16
27.4
-16
27.1
-17
23
-17
20.7
-16
20.6
-18
21.7
-19
22
-18
23.1
-15
23.5
-16
24.6
-16
27.425
San Pablo 28.6
-4
28.8
-10
27.4
-9
23.8
-12
19.3
-14
21.4
-10
24
-7
25.9
-9
23.7
-11
26.7
-12
27.8
-14
28.826
Eastern District:
Bethel Island 21.3
-7
23.5
-8
23.9
-8
29.3
-3
31.4
-1
32.6
-2
34
-4
34.9
-8
35
-13
35.7
-17
37.1
-21
37.133
Concord 24.6
+0
24.8
-5
25
-7
26.4
-6
25.5
-9
24.9
-9
25.5
-11
24.6
-17
24.6
-20
27.3
-23
27.7
-26
27.725
Fairfield 24.7
-13
25.2
-10
25.2
-9
22.8
-12
21.8
-14
20.8
-14
22.7
-13
25.6
-12
28.2
-13
31.8
-13
32.2
-16
32.225
Livermore 24.8
+3
26
+0
25.5
+0
25.3
+9
26.7
+8
26.4
-6
27
-7
26.5
-10
26.6
-19
27.5
-22
27.2
-28
27.526
San Ramon 22.2
+4
22.8
+2
23.3
+3
24.9
+8
23.3
+7
21.6
-4
21.8
-8
22.3
-12
22.2
-20
23.7
-21
24.923
South Central Bay:
Hayward 25.4
-15
25.3
-19
26.3
-19
26.4
-19
24.3
-19
22.9
-19
20.9
-18
22.8
-18
23.7
-19
24.5
-21
25.3
-26
26.425
Redwood City 29.5
+10
28.7
+16
26.9
+15
15.7
-2
18.5
+10
18.7
-1
21.8
-7
23.7
-10
24.4
-13
23.9
-17
24.7
-19
29.524
Santa Clara Valley:
Cupertino 15.5
-6
18
-5
15.6
-10
15.2
-11
10.3
-11
17.1
-19
20.6
-9
23.3
+4
25.2
+4
27.1
-7
29.1
-18
29.120
Gilroy 14.9
-2
11.6
-7
11.2
-10
3.4
-12
3.3
-6
10.4
-2
24.5
-1
30.9
-4
30.5
-11
31.7
-17
33.9
-23
33.921
Los Gatos 15.4
-2
13.1
-5
11.1
-8
13.1
-8
13
-3
16.1
-9
19.3
-13
21.9
-11
23.8
-8
25.7
-14
28.8
-17
28.820
San Jose Central 20.6
-15
21.4
-12
15.8
-7
10.3
-20
16.8
-19
22.3
-16
25.4
-14
26.4
-13
27.6
-17
27.9
-22
27.921
San Martin 18
+3
21.5
+16
21.2
+14
13.6
+9
14
+9
20
+6
27.8
+3
28
-5
29.9
-10
31.4
-17
34.2
-20
34.224
Hour:1234567891011121314151617181920212223241Hr8Hr

* Note: Daily Max 1HR column is for State standard and 8HR is for National 8-Hour standard.
Ozone values exceeding the standards are displayed in red in their respective columns.