| Jefferson County Department of Health |
| Huntsville Natural Resources and Environmental Management |
| Alabama Department of Environmental Management |
| Alaska Department of Environmental Conservation |
| Pinal County Air Quality Control District |
| Pima County Department of Environmental Quality |
| Maricopa County - Air Quality Department |
| Arizona Department of Environmental Quality |
| Arkansas Department of Environmental Quality |
| Yolo-Solano Air Quality Management District |
| Ventura County Air Pollution Control District |
| South Coast Air Quality Management District |
| Santa Barbara County Air Pollution Control District |
| San Luis Obispo County Air Pollution Control District |
| San Joaquin Valley Unified Air Pollution Control District |
| San Francisco Bay Area Air Quality Management District |
| San Diego Air Pollution Control District |
| Sacramento Metropolitan Air Quality Management District |
| Placer County Air Pollution Control District |
| Northern Sierra Air Quality Management District |
| Mojave Desert Air Quality Management District |
| Imperial County Air Pollution Control District |
| California Air Resources Board |
| Colorado Department of Public Health and Environment |
| Connecticut Department of Environmental Protection |
| Delaware Department of Natural Resources and Environment |
| Metropolitan Washington Council of Governments |
| District of Columbia - Department of Health - Air Quality Division |
| Sarasota County - Environmental Services - Air and Water Quality Protection |
| Pinellas County Environmental Management |
| Palm Beach County - Health Department - Division of Environmental Science & Engineering |
| Orlando-Orange County - Health Department |
| Miami-Dade County - Department of Environmental Resources Management |
| Florida Department of Environmental Protection |
| Environmental Protection Commission of Hillsborough County |
| City of Jacksonville - Environmental Quality Division |
| Broward County - Air Quality Division |
| Georgia Department of Natural Resources |
| Hawaii State Department of Health |
| Idaho Department of Environmental Quality |
| Illinois Environmental Protection Agency |
| Vanderburgh County Health Dept. |
| Indianapolis Public Works - Office of Environmental Services |
| Indiana Department of Environmental Management |
| Evansville EPA |
| Polk County Air Quality Division |
| Linn County Public Health |
| Iowa Department of Natural Resources |
| Kansas Department of Health and Environment |
| Louisville Metro Air Pollution Control District |
| Kentucky Department of Environmental Protection |
| Louisiana Department of Environmental Quality - Shreveport |
| Louisiana Department of Environmental Quality - New Orleans |
| Louisiana Department of Environmental Quality - Baton Rouge |
| Maine Department of Environmental Protection |
| Maryland Department of Environment |
| Massachusetts Department of Environmental Protection |
| Michigan Department of Environmental Quality |
| Minnesota Pollution Control Agency |
| Mississippi Department of Environmental Quality |
| St. Louis Metropolitan Area - American Lung Association |
| Missouri Department of Natural Resources |
| Montana Department of Environmental Quality |
| Nebraska Department of Environmental Quality |
| Douglas County Health Department |
| Washoe County District Health Department |
| Clark County - Department of Air Quality Management |
| New Hampshire Department of Environmental Services |
| New Jersey Department of Environmental Protection |
| New Mexico Air Quality Bureau |
| Albuquerque Environmental Health Department |
| New York Department of Environmental Conservation |
| North Carolina Department of Environment and Natural Resources |
| Forsyth County Office of Environmental Assistance and Protection |
| Mecklenburg County Air Quality |
| North Dakota Department of Health - Environmental Health Section |
| Southwest Ohio Air Quality Agency |
| Mid-Ohio Regional Planning Commission |
| Northeast Ohio Areawide Coordinating Agency |
| Ohio Environmental Protection Agency - Division of Air Pollution Control |
| Regional Air Pollution Control Agency - Dayton |
| Eastgate Regional Council of Governments |
| Oklahoma Department of Environmental Quality |
| Oregon Department of Environmental Quality |
| Lane Region Air Pollution Authority |
| Philadelphia Air Management Services |
| Pennsylvania Department of Environmental Protection |
| Allegheny County |
| Rhode Island Department of Environmental Management |
| South Carolina Department of Health and Environmental Control - Bureau of Air Quality |
| South Dakota Department of Environment and Natural Resources |
| Tennessee Department of Environment and Conservation - Air Pollution Control Division |
| Nashville and Davidson County Health Department - Pollution Control Division |
| Chattanooga-Hamilton County - Air Pollution Control Bureau |
| Knox County - Department of Air Quality Management |
| Memphis and Shelby County - Health Department |
| Texas Commission on Environmental Quality |
| Utah Department of Environmental Quality |
| Vermont Air Pollution Control Division |
| Virginia Department of Environmental Quality |
| Southwest Clean Air Agency |
| Spokane Regional Clean Air Agency |
| Washington State Department of Ecology |
| Yakima Regional Clean Air Agency |
| Puget Sound Clean Air Agency |
| Benton Clean Air Authority |
| Northwest Clean Air Agency |
| Olympic Region Clean Air Agency |
| West Virginia Division of Environmental Protection - Division of Air Quality |
| Wisconsin Department of Natural Resources |
| Northeast States For Coordinated Air Use Management |
| Mid-Atlantic Regional Air Management Association |
| Lake Michigan Air Directors Consortium |
