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Forecast By County
Tuesday, September 30
Tue Wed
El Dorado
47
49
Placer
47
49
Sacramento
49
49
Yolo-Solano
45
47

The map below 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 30, 2014 4 a.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   14 18 at 12 a.m.
Colfax   12 13 at 1 a.m.
Cool (Seasonal)   16 19 at 12 a.m.
Davis - UCD Campus   10 11 at 1 a.m.
Elk Grove   8 8 at 3 a.m.
Folsom   14 18 at 12 a.m.
Grass Valley  *   31 35 at 12 a.m.
Lincoln   14 17 at 12 a.m.
North Highlands   13 15 at 1 a.m.
Placerville   28 30 at 1 a.m.
Roseville - N.Sunrise/Douglas   14 16 at 12 a.m.
Sacramento - Del Paso Manor   8 12 at 1 a.m.
Sacramento - T Street   10 14 at 12 a.m.
Sloughhouse   9 14 at 12 a.m.
Yuba City   11 12 at 2 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
September 30, 2014 4 a.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   60 60 at 4 a.m.
Colfax   59 61 at 2 a.m.
Davis - UCD Campus   31 41 at 12 a.m.
Elk Grove   52 55 at 1 a.m.
Folsom   32 35 at 1 a.m.
Grass Valley  *   88 144 at 12 a.m.
Lincoln   34 34 at 4 a.m.
Rio Vista   27 38 at 12 a.m.
Roseville - N.Sunrise/Douglas   50 56 at 12 a.m.
Sacramento - Del Paso Manor   24 24 at 12 a.m.
Sacramento - T Street   27 62 at 1 a.m.
Sloughhouse   21 27 at 12 a.m.
Vacaville   10 10 at 4 a.m.
Woodland   10 10 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