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Forecast By County
Thursday, July 31
Thu Fri
El Dorado
106
116
Placer
101
109
Sacramento
101
111
Yolo-Solano
77
84

The below map is a 1-hour snapshot. Click to view all hours recorded since midnight.
Current map

Spare The Air Days
2014
Spare The Air Days:
2

Current Conditions: Ozone

AQI Look-up Table for Ozone concentrations
July 31, 2014 4 a.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   30 31 at 1 a.m.
Colfax   24 24 at 2 a.m.
Cool (Seasonal)   27 31 at 12 a.m.
Davis - UCD Campus   10 10 at 2 a.m.
Elk Grove   13 14 at 12 a.m.
Folsom   23 28 at 1 a.m.
Grass Valley  *   46 48 at 1 a.m.
Lincoln   24 25 at 1 a.m.
North Highlands   16 18 at 12 a.m.
Placerville   36 37 at 12 a.m.
Roseville - N.Sunrise/Douglas   22 25 at 1 a.m.
Sacramento - Del Paso Manor   13 14 at 12 a.m.
Sacramento - T Street   14 14 at 2 a.m.
Sloughhouse   19 19 at 2 a.m.
Vacaville   14 15 at 12 a.m.
Woodland   10 11 at 1 a.m.
Yuba City   13 17 at 12 a.m.

* The Sacramento region is designated as a severe nonattainment area for the 1997 federal 8-hour ozone standard with an attainment deadline of June 2019. This federal nonattainment area includes all of Sacramento and Yolo counties and portions of El Dorado, Placer, Sutter and Solano counties. It does not include Nevada County (Grass Valley), which has its own nonattainment area for outreach, planning and regulatory purposes. Nor does it include Yuba City, which is outside of this federal boundary.


AQI Chart - EnglishAQI en español
AQI Look-up Table for PM2.5 concentrations
July 31, 2014 4 a.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   37 37 at 3 a.m.
Colfax   33 33 at 3 a.m.
Davis - UCD Campus   33 40 at 12 a.m.
Elk Grove   31 33 at 1 a.m.
Folsom   25 25 at 3 a.m.
Grass Valley  *   Missing Missing
Lincoln   28 36 at 1 a.m.
Rio Vista   33 35 at 12 a.m.
Roseville - N.Sunrise/Douglas   40 40 at 3 a.m.
Sacramento - Del Paso Manor   11 19 at 12 a.m.
Sacramento - T Street   28 29 at 12 a.m.
Sloughhouse   20 27 at 12 a.m.
Vacaville   15 15 at 2 a.m.
Woodland   Missing 2 at 12 a.m.

AQI Chart - EnglishAQI en español

There are 18 ground-level ozone monitoring sites throughout the federal nonattainment area.

Monitoring Sites - Operated By Local Air Districts
1. Woodland GP
2. Vacaville-Elmira G
3. Auburn GP
4. Colfax GPM
5. Folsom GMP
6. North Highlands GP
7. Elk Grove-Bruceville GPM
8. Del Paso Manor GPM
9. El Camino & Watt GP
10. Stockton Blvd. P
11. Sloughhouse GM
12. Goldenland Ct. GPM
Monitoring Sites - Operated By ARB
13. Walnut Grove GM
14. Davis GPM
15. Roseville GPTM
16. Cool GM
17. Placerville GPM
18. Downtown Sacramento 13th and T GPAM
Legend
G Gaseous Monitoring
P Particulate Monitoring
T Toxics Sampling
A Acid Deposition Sampling
M Meteorological Monitoring