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Forecast By County
Wednesday, October 01
Wed Thu
El Dorado
46
58
Placer
46
58
Sacramento
47
64
Yolo-Solano
42
51

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 1, 2014 9 p.m. (PDT)
Site Name Current Ozone AQI Max Ozone AQI (PST)
Auburn   24 33 at 1 p.m.
Colfax   17 35 at 11 a.m.
Cool (Seasonal)   29 38 at 2 p.m.
Davis - UCD Campus   18 24 at 12 a.m.
Elk Grove   20 32 at 1 p.m.
Folsom   31 37 at 2 p.m.
Grass Valley   36 40 at 4 p.m.
Lincoln   23 31 at 2 p.m.
North Highlands   24 36 at 2 p.m.
Placerville   28 36 at 3 p.m.
Roseville - N.Sunrise/Douglas   20 33 at 1 p.m.
Sacramento - Del Paso Manor   18 35 at 10 a.m.
Sacramento - T Street   20 32 at 2 p.m.
Sloughhouse   25 35 at 2 p.m.
Vacaville   19 33 at 11 a.m.
Woodland   21 34 at 11 a.m.
Yuba City   27 32 at 2 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 1, 2014 9 p.m. (PDT)
Site Name Current PM2.5 AQI Max PM2.5 AQI (PST)
Auburn   10 25 at 12 a.m.
Colfax   26 38 at 4 a.m.
Davis - UCD Campus   12 25 at 12 a.m.
Elk Grove   28 42 at 3 p.m.
Folsom   11 25 at 12 a.m.
Grass Valley   52 52 at 1 a.m.
Lincoln   16 24 at 12 a.m.
Rio Vista   10 29 at 12 a.m.
Roseville - N.Sunrise/Douglas   22 44 at 12 a.m.
Sacramento - Del Paso Manor   20 19 at 8 p.m.
Sacramento - T Street   15 39 at 12 a.m.
Sloughhouse   8 18 at 12 a.m.
Vacaville   0 5 at 12 a.m.
Woodland   Missing 0 at 1 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