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Forecast By County
Friday, October 24
Fri Sat
El Dorado
46
36
Placer
42
35
Sacramento
46
38
Yolo-Solano
38
34

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: PM2.5

AQI Look-up Table for Ozone concentrations
October 24, 2014 2 p.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   41 41 at 12 p.m.
Colfax   38 38 at 12 p.m.
Cool (Seasonal)   42 42 at 11 a.m.
Davis - UCD Campus   24 24 at 12 p.m.
Elk Grove   18 18 at 12 p.m.
Folsom   33 33 at 12 p.m.
Grass Valley   47 47 at 12 p.m.
Lincoln   24 24 at 12 p.m.
North Highlands   25 25 at 12 p.m.
Placerville   42 43 at 7 a.m.
Roseville - N.Sunrise/Douglas   32 32 at 12 p.m.
Sacramento - Del Paso Manor   25 25 at 12 p.m.
Sacramento - T Street   18 18 at 12 p.m.
Sloughhouse   26 26 at 12 p.m.
Vacaville   29 29 at 12 p.m.
Woodland   26 26 at 12 p.m.
Yuba City   24 24 at 12 p.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 24, 2014 2 p.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   27 27 at 1 p.m.
Colfax   19 44 at 8 a.m.
Davis - UCD Campus   39 39 at 1 p.m.
Elk Grove   35 37 at 11 a.m.
Folsom   25 33 at 7 a.m.
Grass Valley   22 42 at 8 a.m.
Lincoln   38 38 at 1 p.m.
Rio Vista   16 31 at 7 a.m.
Roseville - N.Sunrise/Douglas   33 43 at 6 a.m.
Sacramento - Del Paso Manor   29 29 at 11 a.m.
Sacramento - T Street   42 42 at 11 a.m.
Sloughhouse   7 23 at 6 a.m.
Vacaville   6 13 at 3 a.m.
Woodland   38 50 at 9 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