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California Air Resources Board
ARB's Aerometric Data Analysis and Management system
Select 8 Summary: Choose Statistics, Years, & Areas Frequently
Asked
Questions
Number of statistics times the number of years must equal 8 or less

Step 1:
Select Statistics
Ozone 1-Hour Ozone 8-Hour PM2.5 PM10
Days > Standard Days > Standard Est Days > Standard Est Days > Standard
National 1-Hour
State 1-Hour
1-Hour Observations
Maximum
National 1-Year
Estimated Expected
Number of
Exceedance Days
National 3-Year
Estimated Expected
Number of
Exceedance Days
National Design
Value
State Designation
Value
Expected Peak
Day Concentration
Year Coverage
National 0.070 ppm Std
National 0.075 ppm Std
National 0.08 ppm Std
State Standard
8-Hour Averages
National 0.070 ppm
Standard Maximum
National 0.075 ppm
and 0.08 ppm
Standards Maximum
State Maximum
National 0.070 ppm
Standard
Design Value
National 0.075 ppm
Standard
Design Value
National 0.08 ppm
Standard
Design Value
State Designation
Value
Expected Peak
Day Concentration
Year Coverage
National 24-Hour
Annual Averages
National
State
National Design
Value
State Designation
Value
24-Hour Averages
National Maximum
State Maximum
National 98th
Percentile
National Design
Value
Year Coverage
National 24-Hour
State 24-Hour
Annual Averages
National
State
National 3-Year
State 3-Year
24-Hour Averages
National Maximum
State Maximum
Expected Peak
Day Concentration
Year Coverage

Step 2:
Select Years
2017 2012 2007 2002 1997 1992 1987 1982 1977
2016 2011 2006 2001 1996 1991 1986 1981 1976
2015 2010 2005 2000 1995 1990 1985 1980 1975
2014 2009 2004 1999 1994 1989 1984 1979 1974
2013 2008 2003 1998 1993 1988 1983 1978 1973

Step 3:
Select Areas


Map of California's Regions and Counties
Regions California's Counties
Greater Los Angeles Alameda Imperial Mono San Solano
Sacramento Valley Alpine Inyo Monterey Francisco Sonoma
San Diego Amador Kern Napa San Joaquin Stanislaus
San Francisco Bay Butte Kings Nevada San Luis Sutter
San Joaquin Valley Calaveras Lake Orange Obispo Tehama
Santa Barbara- Colusa Lassen Placer San Mateo Trinity
Ventura Contra Los Angeles Plumas Santa Tulare
Other Central State Costa Madera Riverside Barbara Tuolumne
Other Northern State Del Norte Marin Sacramento Santa Clara Ventura
Other Southern State El Dorado Mariposa San Benito Santa Cruz Yolo
Fresno Mendocino San Shasta Yuba
Mexico Glenn Merced Bernardino Sierra
Humboldt Modoc San Diego Siskiyou
Special Ozone 8-Hour Planning Areas
Antelope Valley & W Mojave Desert Eastern Kern County Southern Mountain Counties
Central Mountain Counties Sacramento Metropolitan Area Sutter Buttes
Coachella Valley South Coast Western Nevada County

Step 4:
Continue to Location Selection
Notes: You may choose any combination of statistics and years such that the number of statistics chosen
times the number of years chosen is 8 or less.
Not all years are available for all pollutants.
Not all pollutants and statistics are available for all regions, counties, or planning areas.
Go to: Data Statistics Home Page