tips
Forecast By County
Tuesday, September 16
Tue Wed
El Dorado
49
44
Placer
49
44
Sacramento
49
42
Yolo-Solano
38
34

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:
4

Current Conditions: Ozone

AQI Look-up Table for Ozone concentrations
September 16, 2014 10 p.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   20 42 at 12 p.m.
Colfax   18 39 at 10 a.m.
Cool (Seasonal)   28 49 at 5 p.m.
Davis - UCD Campus   6 14 at 3 a.m.
Elk Grove   17 40 at 12 p.m.
Folsom   24 47 at 12 p.m.
Grass Valley  *   36 42 at 7 p.m.
Lincoln   23 41 at 12 p.m.
North Highlands   15 46 at 11 a.m.
Placerville   42 42 at 6 p.m.
Roseville - N.Sunrise/Douglas   14 47 at 11 a.m.
Sacramento - Del Paso Manor   15 42 at 11 a.m.
Sacramento - T Street   16 41 at 11 a.m.
Sloughhouse   25 45 at 1 p.m.
Vacaville   22 40 at 11 a.m.
Woodland   14 37 at 11 a.m.
Yuba City   25 40 at 2 p.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
September 16, 2014 10 p.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   17 25 at 6 p.m.
Colfax   42 111 at 4 p.m.
Davis - UCD Campus   52 51 at 8 a.m.
Elk Grove   51 51 at 9 p.m.
Folsom   25 35 at 3 p.m.
Grass Valley  *   Missing Missing
Lincoln   44 44 at 10 p.m.
Rio Vista   30 30 at 8 p.m.
Roseville - N.Sunrise/Douglas   31 38 at 4 a.m.
Sacramento - Del Paso Manor   34 34 at 10 p.m.
Sacramento - T Street   52 52 at 9 p.m.
Sloughhouse   23 25 at 8 p.m.
Vacaville   9 8 at 10 p.m.
Woodland   22 23 at 8 p.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