Chatfield Park - 11500 N. Roxborough Park Rd.
Eastern Band of Cherokee: Old Cherokee High
Estacada Clackamas River Elementary School
Theodore Roosevelt NP - Painted Canyon VC

Pennsylvania Dept. of Environmental Protection
Massachusetts Dept. of Environmental Protection
Idaho Department of Environmental Quality
Texas Commission on Environmental Quality
Arkansas Department of Environmental Quality
Michigan Department of Environment, Great Lakes, and Energy
New Hampshire Dept. of Environmental Services
Twenty-Nine Palms Band of Mission Indians
Louisiana Department of Environmental Quality
Florida Dept. of Environmental Protection
South Dakota Department of Environment and Natural Resources
British Columbia Ministry of Environment
New York Dept. of Environmental Conservation
Alberta Environmental Monitoring and Reporting Agency (AEMERA)
Great Basin Unified Air Pollution Control District
Utah Department of Environmental Quality
North Coast Unified Air Quality Management District
Pinal County Air Quality Control District
New Jersey Dept. of Environmental Protection
Wyoming Department of Environmental Quality
Washoe County Health District Air Quality Management Division
Imperial County Air Pollution Control District
North Carolina DEQ - Division of Air Quality
Oklahoma Department of Environmental Quality
Missouri Department of Natural Resources
West Virginia Division of Air Quality - Wheeling
Manitoba Conservation Air Quality Section
Louisville Metro Air Pollution Control District
Colorado Department of Public Health and Environment
Knox County Dept. of Air Quality Management
Santa Barbara County Air Pollution Control District
Clark County Department of Environment and Sustainability
Douglas County Health Department (Omaha)
Tehama County Air Pollution Control District
Delaware Dept. of Natural Resources and Environment
Alabama Department of Environmental Management
Secretaría de Medio Ambiente y Ordenamiento Territorial
EPA Office of Air Quality Planning and Standards
Red de Monitoreo de la Calidad del Aire de la Ciudad de Mexico
Broward County Environmental Engineering and Permitting  Division
Arizona Department of Environmental Quality
Indiana Dept. of Environmental Management
Shasta County Air Quality Management District
District of Columbia - Department of Energy and Environment
City of Jacksonville - Environmental Quality Division
Rhode Island Dept. of Environmental Management
Connecticut Dept. of Energy and Environmental Protection
North Dakota Department of Environmental Quality
Nebraska Department of Environment and Energy
Pima County Department of Environmental Quality
Nevada Division of Environmental Protection
Huntsville Natural Resources and Environmental Management
Chattanooga-Hamilton County Air Pollution Control Bureau
Quality Review and Exchange System for Tribes (QREST)
Forsyth County Office of Environmental Assistance and Protection

New York-Northern New Jersey-Long Island, NY-NJ-PA