Visibility Links

National Park Service Visibility Monitoring Program
Western Regional Air Partnership (WRAP)
National Park Service-Fish & Wildlife Service AIRWeb
Visibility and Air Pollution from US EPA
National Park Service Fort Collins Air Resources Division

U.S. EPA Air Quality Links

Support Center for Regulatory Air Models (SCRAM) home page
EPA AQ Models (SCRAM FTP site)
AP-42 Emission Factors: Volume I, Volume II
TTNWeb
Clearinghouse for Inventories and Emission Factors (CHIEF)
Aerometric Information Retrieval System (AIRS)
Look up a monitor
Look up monitor values by state, year and pollutant
Look up sources
Maps of monitors, sources and nonattainment areas

PM_2.5 monitoring and data analysis

The Virtual Workgroup for the PM2.5 Analysis Workbook
EPA PM2.5 data analysis
PM2.5 monitoring information documents
California's PM2.5 network
PM2.5 supersites program

Software

Wind rose program WINDROSE from US EPA
Wind rose plotting program WRPLOT for free from US EPA
WRPLOT for $69 from NTIS
WRPLOT View from Lakes Environmental
WindRose: Version 2.0 from Advanced Technology Systems, Inc.

US Air Quality Monitoring and Data By State

Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Lousiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming

Air Quality in other countries and regions around the world

Australia, Perth area
Austria
Berlin
Belgium
Bayern (Bavaria)
Brazil
Canada
Czech Republic
Denmark network
Denmark
Estonia-Tallinn
Finland
France
Hong Kong
India
Italy
Iran (Tehran)
Japan
Latvia
Vilnius, Lithuania
Malaysia
Mexico City
Netherlands
New Zealand
Norway
Peoples Republic of China
Republic of Korea
Singapore
Spain, Andalucia
Swedish Environmental Research Institute
Sweden, Göteborg
Sweden, Norrköping
Sweden, Stockholm
Taiwan, Republic of China
Thailand
Thailand air quality monitoring
United Kingdom
Zagreb
Armidale, Australia

Air Quality Organizations

Air Resource Specialists, ARS
Clean Air Act Information Network
Northeast States for Coordinated Air Use Management (NESCAUM)
Air & Waste Management Association
Center for Air Pollution Impactand Trend Analysis (CAPITA)
Meteorological Solutions Inc.
STAPPA/ALAPCO
Health Effects Institute
American Lung Association air quality information