Air Quality Forecast Guidance for Hetch Hetchy, CA

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 37.95 N, longitude: 119.79 W.
Ozone concentrations are presented in parts per billion (PPB).
Public comments and suggestions are encouraged.

A FAQ page is available.
More information...
24Hr Maximum
Ending
Maximum 1 Hour Average Ozone
Concentration (PPB)*
Maximum 8 Hour Average Ozone
Concentration (PPB)*
Tomorrow
(Ending 07/26, 4Z)
61
58
*Due to grid interpolation methods, the maximum 1- and 8-hour ozone concentration values may have
values slightly higher or lower than those of the corresponding hourly ozone concentrations.

Ozone
Ending Time
1 Hour Average Ozone
Concentration (PPB)

12Z Model Run
8 Hour Average Ozone
Concentration (PPB)

12Z Model Run
Mon, 25 Jul  01 PM
56
55
Mon, 25 Jul  02 PM
56
56
Mon, 25 Jul  03 PM
55
56
Mon, 25 Jul  04 PM
56
56
Mon, 25 Jul   05 PM
57
56
Mon, 25 Jul   06 PM
59
56
Mon, 25 Jul   07 PM
60
57
Mon, 25 Jul   08 PM
61
57
Mon, 25 Jul   09 PM
58
58
Mon, 25 Jul   10 PM
54
58
Mon, 25 Jul   11 PM
55
57
Tue, 26 Jul   12 AM
53
57
Tue, 26 Jul   01 AM
52
56
Tue, 26 Jul   02 AM
50
55
Tue, 26 Jul   03 AM
49
54
Tue, 26 Jul   04 AM
48
52
Tue, 26 Jul   05 AM
48
51
Tue, 26 Jul   06 AM
47
50
Tue, 26 Jul   07 AM
47
49
Tue, 26 Jul   08 AM
47
48
Tue, 26 Jul   09 AM
48
48
Tue, 26 Jul   10 AM
49
48
Tue, 26 Jul   11 AM
50
48
Tue, 26 Jul   12 PM
52
48
Tue, 26 Jul   01 PM
54
49
Tue, 26 Jul   02 PM
54
50
Tue, 26 Jul   03 PM
55
51
Tue, 26 Jul   04 PM
57
52
Tue, 26 Jul   05 PM
59
54
Tue, 26 Jul   06 PM
60
55
Tue, 26 Jul   07 PM
61
57
Tue, 26 Jul   08 PM
59
57
Tue, 26 Jul   09 PM
54
58
Tue, 26 Jul   10 PM
50
57
Tue, 26 Jul   11 PM
50
56
Wed, 27 Jul   12 AM
48
55
Wed, 27 Jul   01 AM
48
54
Wed, 27 Jul   02 AM
47
52
Wed, 27 Jul   03 AM
47
50
Wed, 27 Jul   04 AM
47
49
Wed, 27 Jul   05 AM
47
48
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)

06Z Model Run
Mon, 25 Jul  01 PM
0
0
Mon, 25 Jul  02 PM
0
0
Mon, 25 Jul  03 PM
0
0
Mon, 25 Jul  04 PM
0
0
Mon, 25 Jul  05 PM
0
0
Mon, 25 Jul  06 PM
0
0
Mon, 25 Jul  07 PM
0
0
Mon, 25 Jul  08 PM
0
0
Mon, 25 Jul  09 PM
0
1
Mon, 25 Jul  10 PM
0
1
Mon, 25 Jul  11 PM
0
0
Tue, 26 Jul  12 AM
0
1
Tue, 26 Jul  01 AM
0
1
Tue, 26 Jul  02 AM
0
1
Tue, 26 Jul  03 AM
0
1
Tue, 26 Jul  04 AM
0
1
Tue, 26 Jul  05 AM
0
1
Tue, 26 Jul  06 AM
0
1
Tue, 26 Jul  07 AM
0
1
Tue, 26 Jul  08 AM
0
0
Tue, 26 Jul  09 AM
0
0
Tue, 26 Jul  10 AM
0
1
Tue, 26 Jul  11 AM
0
1
Tue, 26 Jul  12 PM
0
1
Tue, 26 Jul  01 PM
0
1
Tue, 26 Jul  02 PM
0
1
Tue, 26 Jul  03 PM
0
1
Tue, 26 Jul  04 PM
0
1
Tue, 26 Jul  05 PM
0
1
Tue, 26 Jul  06 PM
0
2
Tue, 26 Jul  07 PM
0
3
Tue, 26 Jul  08 PM
0
2
Tue, 26 Jul  09 PM
0
2
Tue, 26 Jul  10 PM
0
1

National Weather Service Air Quality Program Page
Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
FAQ


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