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Forecast By County
Friday, October 31
Fri Sat
El Dorado
34
25
Placer
32
42
Sacramento
36
42
Yolo-Solano
32
42

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

Current Conditions: Ozone

AQI Look-up Table for Ozone concentrations
October 31, 2014 3 p.m. (PST)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   21 25 at 1 p.m.
Colfax   23 26 at 9 a.m.
Cool (Seasonal)   28 31 at 9 a.m.
Davis - UCD Campus   25 25 at 2 p.m.
Elk Grove   21 25 at 1 p.m.
Folsom   26 27 at 1 p.m.
Grass Valley  *   26 37 at 1 a.m.
Lincoln   23 25 at 12 a.m.
North Highlands   21 23 at 1 p.m.
Placerville   24 33 at 4 a.m.
Roseville - N.Sunrise/Douglas   21 25 at 1 p.m.
Sacramento - Del Paso Manor   19 22 at 1 p.m.
Sacramento - T Street   15 18 at 1 p.m.
Sloughhouse   22 25 at 1 p.m.
Vacaville   23 24 at 12 a.m.
Woodland   25 25 at 2 p.m.
Yuba City   15 19 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
October 31, 2014 3 p.m. (PST)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   15 23 at 2 a.m.
Colfax   38 55 at 9 a.m.
Davis - UCD Campus   25 48 at 11 a.m.
Elk Grove   25 35 at 11 a.m.
Folsom   20 29 at 11 a.m.
Grass Valley  *   31 61 at 12 p.m.
Lincoln   21 28 at 12 a.m.
Rio Vista   8 33 at 10 a.m.
Roseville - N.Sunrise/Douglas   52 52 at 12 p.m.
Sacramento - Del Paso Manor   9 20 at 11 a.m.
Sacramento - T Street   39 56 at 10 a.m.
Sloughhouse   17 25 at 1 a.m.
Vacaville   5 17 at 12 a.m.
Woodland   27 44 at 10 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