tips
Forecast By County
Thursday, April 17
Thu Fri
Placer
42
38
Sacramento
46
38
Yolo-Solano
42
33

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:
0

Current Conditions: Ozone

AQI Look-up Table for Ozone concentrations
April 17, 2014 8 a.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   19 25 at 4 a.m.
Davis - UCD Campus   5 8 at 1 a.m.
Elk Grove   9 13 at 2 a.m.
Folsom   14 25 at 2 a.m.
Grass Valley  *   31 36 at 3 a.m.
Lincoln   8 15 at 4 a.m.
North Highlands   8 18 at 3 a.m.
Placerville   34 35 at 12 a.m.
Roseville - N.Sunrise/Douglas   21 25 at 12 a.m.
Sacramento - Del Paso Manor   10 17 at 3 a.m.
Sacramento - T Street   16 17 at 12 a.m.
Sloughhouse   18 21 at 12 a.m.
Vacaville   8 14 at 3 a.m.
Woodland   5 7 at 5 a.m.
Yuba City   11 17 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
April 17, 2014 8 a.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   22 27 at 4 a.m.
Colfax   33 33 at 9 a.m.
Davis - UCD Campus   38 38 at 3 a.m.
Elk Grove   33 40 at 4 a.m.
Folsom   24 34 at 3 a.m.
Grass Valley  *   23 28 at 3 a.m.
Lincoln   14 30 at 4 a.m.
Rio Vista   51 55 at 3 a.m.
Roseville - N.Sunrise/Douglas   36 40 at 1 a.m.
Sacramento - Del Paso Manor   31 33 at 3 a.m.
Sacramento - T Street   34 52 at 3 a.m.
Sloughhouse   15 25 at 12 a.m.
Vacaville   88 89 at 5 a.m.
Woodland   23 24 at 6 a.m.

AQI Chart - EnglishAQI en español

The real-time Particulate Matter (PM2.5) data displayed on this page is for public information reporting and forecasting only. Per state and federal regulations, it is not used for attainment determination purposes.

Compared to ground-level ozone programs, PM2.5 monitoring, forecasting and mapping is still in its infancy. Fine Particulate Matter, known as PM2.5, is a complex mixture that may contain soot, smoke, metals, nitrates, sulfates, dust, water and tire rubber. It can be directly emitted, as in smoke from a fire, or it can form in the atmosphere from reactions of gases such as nitrogen oxides.

Five (5) sites in Sacramento County:
  • Elk Grove
  • Folsom
  • Del Paso Manor (near Watt Ave. and El Camino Ave.)
  • Sloughhouse
  • T Street (13th & T in downtown Sacramento)
Two (2) sites in Yolo County:
  • Davis
  • Woodland
Two (2) sites in Solano County:
  • Rio Vista
  • Vacaville
Three (3) sites in Placer County:
  • Auburn
  • Lincoln
  • Roseville (N. Sunrise/Douglas Blvd.)
One (1) site in Nevada County:
  • Grass Valley