Forecast By County
Sunday, January 25
Sun Mon
Placer
97
99
Sacramento
102
102
Yolo-Solano
80
84

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
January 25, 2015 10 a.m. (PST)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   17 21 at 4 a.m.
Colfax   16 20 at 6 a.m.
Davis - UCD Campus   13 14 at 7 a.m.
Elk Grove   11 13 at 5 a.m.
Folsom   8 8 at 5 a.m.
Grass Valley   37 37 at 5 a.m.
Lincoln   4 5 at 5 a.m.
North Highlands   8 9 at 5 a.m.
Placerville   31 31 at 3 a.m.
Roseville - N.Sunrise/Douglas   5 8 at 3 a.m.
Sacramento - Del Paso Manor   10 13 at 2 a.m.
Sacramento - T Street   8 10 at 4 a.m.
Sloughhouse   11 12 at 8 a.m.
Vacaville   11 12 at 6 a.m.
Woodland   12 12 at 7 a.m.
Yuba City   8 8 at 8 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
January 25, 2015 10 a.m. (PST)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   30 46 at 12 a.m.
Colfax   15 21 at 3 a.m.
Davis - UCD Campus   60 74 at 1 a.m.
Elk Grove   68 84 at 4 a.m.
Folsom   14 29 at 1 a.m.
Grass Valley   14 15 at 1 a.m.
Lincoln   52 62 at 12 a.m.
Rio Vista   84 84 at 7 a.m.
Roseville - N.Sunrise/Douglas   36 52 at 3 a.m.
Sacramento - Del Paso Manor   22 49 at 1 a.m.
Sacramento - T Street   70 78 at 4 a.m.
Sloughhouse   20 52 at 12 a.m.
Vacaville   57 71 at 2 a.m.
Woodland   67 80 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