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Forecast By County
Thursday, April 24
Thu Fri
Placer
42
29
Sacramento
46
33
Yolo-Solano
42
29

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: PM2.5

AQI Look-up Table for Ozone concentrations
April 24, 2014 6 a.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   22 25 at 2 a.m.
Colfax   20 23 at 3 a.m.
Davis - UCD Campus   15 22 at 3 a.m.
Elk Grove   12 21 at 1 a.m.
Folsom   21 26 at 12 a.m.
Grass Valley   34 40 at 1 a.m.
Lincoln   20 21 at 4 a.m.
North Highlands   20 20 at 5 a.m.
Placerville   27 31 at 3 a.m.
Roseville - N.Sunrise/Douglas   24 25 at 2 a.m.
Sacramento - Del Paso Manor   17 18 at 2 a.m.
Sacramento - T Street   14 15 at 12 a.m.
Sloughhouse   18 20 at 12 a.m.
Vacaville   22 22 at 4 a.m.
Woodland   14 15 at 12 a.m.
Yuba City   18 21 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
April 24, 2014 6 a.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   14 20 at 5 a.m.
Colfax   0 11 at 1 a.m.
Davis - UCD Campus   17 25 at 12 a.m.
Elk Grove   45 45 at 6 a.m.
Folsom   17 18 at 3 a.m.
Grass Valley   20 31 at 1 a.m.
Lincoln   13 21 at 3 a.m.
Rio Vista   20 20 at 5 a.m.
Roseville - N.Sunrise/Douglas   17 28 at 2 a.m.
Sacramento - Del Paso Manor   11 21 at 3 a.m.
Sacramento - T Street   13 13 at 12 a.m.
Sloughhouse   8 24 at 1 a.m.
Vacaville   18 18 at 5 a.m.
Woodland   4 5 at 3 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