Forecast By County
Sunday, April 20
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The below map is a 1-hour snapshot. Click to view all hours recorded since midnight.
Current map

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Current Conditions: PM2.5

AQI Look-up Table for Ozone concentrations
April 20, 2014 1 a.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)

AQI Chart - EnglishAQI en español
AQI Look-up Table for PM2.5 concentrations
April 20, 2014 1 a.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   Missing Missing
Colfax   Missing Missing
Davis - UCD Campus   Missing Missing
Elk Grove   27 27 at 12 a.m.
Folsom   6 5 at 12 a.m.
Grass Valley   Missing Missing
Lincoln   Missing Missing
Rio Vista   Missing Missing
Roseville - N.Sunrise/Douglas   Missing Missing
Sacramento - Del Paso Manor   10 10 at 12 a.m.
Sacramento - T Street   Missing Missing
Sloughhouse   6 5 at 12 a.m.
Woodland   Missing Missing

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