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

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

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