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Forecast By County
Wednesday, October 22
Wed Thu
El Dorado
49
42
Placer
48
41
Sacramento
50
42
Yolo-Solano
41
36

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 22, 2014 6 p.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   31 31 at 4 p.m.
Colfax   30 33 at 11 a.m.
Cool (Seasonal)   36 36 at 4 p.m.
Davis - UCD Campus   29 31 at 11 a.m.
Elk Grove   31 32 at 2 p.m.
Folsom   32 32 at 4 p.m.
Grass Valley   32 35 at 1 a.m.
Lincoln   32 33 at 11 a.m.
North Highlands   32 32 at 4 p.m.
Placerville   35 35 at 4 p.m.
Roseville - N.Sunrise/Douglas   31 31 at 4 p.m.
Sacramento - Del Paso Manor   28 28 at 4 p.m.
Sacramento - T Street   27 27 at 4 p.m.
Sloughhouse   26 26 at 4 p.m.
Vacaville   31 31 at 4 p.m.
Woodland   21 22 at 12 p.m.
Yuba City   26 26 at 4 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 22, 2014 6 p.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   23 37 at 2 p.m.
Colfax   23 27 at 8 a.m.
Davis - UCD Campus   24 38 at 3 a.m.
Elk Grove   20 27 at 6 a.m.
Folsom   15 23 at 2 p.m.
Grass Valley   8 46 at 9 a.m.
Lincoln   13 38 at 10 a.m.
Rio Vista   17 29 at 6 a.m.
Roseville - N.Sunrise/Douglas   12 45 at 2 a.m.
Sacramento - Del Paso Manor   6 50 at 9 a.m.
Sacramento - T Street   17 48 at 10 a.m.
Sloughhouse   4 25 at 12 a.m.
Vacaville   0 13 at 9 a.m.
Woodland   25 46 at 12 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