Forecast By County
Saturday, December 20
Sat Sun
Placer
53
74
Sacramento
57
80
Yolo-Solano
72
78

The map below is a 1-hour snapshot. Click to view all hours recorded since midnight.
Current map

Current Conditions: PM2.5

AQI Look-up Table for Ozone concentrations
December 20, 2014 9 p.m. (PST)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   19 25 at 2 a.m.
Colfax   24 26 at 2 a.m.
Davis - UCD Campus   13 19 at 7 a.m.
Elk Grove   14 24 at 5 a.m.
Folsom   14 25 at 9 a.m.
Grass Valley   34 34 at 8 p.m.
Lincoln   4 6 at 5 p.m.
North Highlands   25 25 at 5 a.m.
Placerville   18 25 at 12 a.m.
Roseville - N.Sunrise/Douglas   11 23 at 6 a.m.
Sacramento - Del Paso Manor   14 27 at 6 a.m.
Sacramento - T Street   9 21 at 7 a.m.
Sloughhouse   19 30 at 5 a.m.
Vacaville   11 14 at 4 p.m.
Woodland   14 23 at 7 a.m.
Yuba City   19 25 at 7 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
December 20, 2014 9 p.m. (PST)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   44 44 at 9 p.m.
Colfax   44 51 at 7 p.m.
Davis - UCD Campus   35 40 at 5 p.m.
Elk Grove   27 27 at 9 p.m.
Folsom   25 25 at 9 p.m.
Grass Valley   24 27 at 7 p.m.
Lincoln   3 15 at 6 a.m.
Rio Vista   72 72 at 9 p.m.
Roseville - N.Sunrise/Douglas   53 53 at 9 p.m.
Sacramento - Del Paso Manor   28 28 at 9 p.m.
Sacramento - T Street   39 39 at 9 p.m.
Sloughhouse   34 34 at 8 p.m.
Vacaville   71 71 at 4 p.m.
Woodland   46 53 at 7 p.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