| Alaska Department of Environmental Conservation (AK) |
| Alabama Department of Environmental Management (AL) |
| Huntsville Natural Resources and Environmental Management (AL) |
| Jefferson County Department of Health (AL) |
| Arkansas Department of Environmental Quality (AR) |
| Arizona Department of Environmental Quality (AZ) |
| Maricopa County - Air Quality Department (AZ) |
| Pima County Department of Environmental Quality (AZ) |
| Pinal County Air Quality Control District (AZ) |
| California Air Resources Board (CA) |
| Imperial County Air Pollution Control District (CA) |
| Mojave Desert Air Quality Management District (CA) |
| Northern Sierra Air Quality Management District (CA) |
| Placer County Air Pollution Control District (CA) |
| Sacramento Metropolitan Air Quality Management District (CA) |
| San Diego Air Pollution Control District (CA) |
| San Francisco Bay Area Air Quality Management District (CA) |
| San Joaquin Valley Unified Air Pollution Control District (CA) |
| San Luis Obispo County Air Pollution Control District (CA) |
| Santa Barbara County Air Pollution Control District (CA) |
| South Coast Air Quality Management District (CA) |
| Ventura County Air Pollution Control District (CA) |
| Yolo-Solano Air Quality Management District (CA) |
| Colorado Department of Public Health and Environment (CO) |
| Connecticut Department of Environmental Protection (CT) |
| District of Columbia - Department of Health - Air Quality Division (DC) |
| Metropolitan Washington Council of Governments (DC) |
| Delaware Department of Natural Resources and Environment (DE) |
| Broward County - Air Quality Division (FL) |
| City of Jacksonville - Environmental Quality Division (FL) |
| Environmental Protection Commission of Hillsborough County (FL) |
| Florida Department of Environmental Protection (FL) |
| Miami-Dade County - Department of Environmental Resources Management (FL) |
| Orange County Environmental Protection Division (FL) |
| Palm Beach County - Health Department - Division of Environmental Science & Engineering (FL) |
| Pinellas County Environmental Management (FL) |
| Sarasota County - Environmental Services - Air and Water Quality Protection (FL) |
| Georgia Department of Natural Resources (GA) |
| Hawaii State Department of Health (HI) |
| Iowa Department of Natural Resources (IA) |
| Linn County Public Health (IA) |
| Polk County Air Quality Division (IA) |
| Idaho Department of Environmental Quality (ID) |
| Illinois Environmental Protection Agency (IL) |
| Evansville EPA (IN) |
| Indiana Department of Environmental Management (IN) |
| Indianapolis Public Works - Office of Environmental Services (IN) |
| Vanderburgh County Health Dept. (IN) |
| Kansas Department of Health and Environment (KS) |
| Kentucky Department of Environmental Protection (KY) |
| Louisville Metro Air Pollution Control District (KY) |
| Louisiana Department of Environmental Quality - Baton Rouge (LA) |
| Louisiana Department of Environmental Quality - New Orleans (LA) |
| Louisiana Department of Environmental Quality - Shreveport (LA) |
| Massachusetts Department of Environmental Protection (MA) |
| Maryland Department of Environment (MD) |
| Maine Department of Environmental Protection (ME) |
| Michigan Department of Environmental Quality (MI) |
| Minnesota Pollution Control Agency (MN) |
| Missouri Department of Natural Resources (MO) |
| St. Louis Metropolitan Area - American Lung Association (MO) |
| Mississippi Department of Environmental Quality (MS) |
| Montana Department of Environmental Quality (MT) |
| Forsyth County Office of Environmental Assistance and Protection (NC) |
| Mecklenburg County Air Quality (NC) |
| North Carolina Department of Environment and Natural Resources (NC) |
| North Dakota Department of Health - Environmental Health Section (ND) |
| Douglas County Health Department (NE) |
| Nebraska Department of Environmental Quality (NE) |
| New Hampshire Department of Environmental Services (NH) |
| New Jersey Department of Environmental Protection (NJ) |
| Albuquerque Environmental Health Department (NM) |
| New Mexico Air Quality Bureau (NM) |
| Clark County - Department of Air Quality Management (NV) |
| Washoe County District Health Department (NV) |
| New York Department of Environmental Conservation (NY) |
| Eastgate Regional Council of Governments (OH) |
| Hamilton County - Environmental Services (OH) |
| Mid-Ohio Regional Planning Commission (OH) |
| Northeast Ohio Areawide Coordinating Agency (OH) |
| Ohio Environmental Protection Agency - Division of Air Pollution Control (OH) |
| Regional Air Pollution Control Agency - Dayton (OH) |
| Oklahoma Department of Environmental Quality (OK) |
| Lane Region Air Pollution Authority (OR) |
| Oregon Department of Environmental Quality (OR) |
| Allegheny County (PA) |
| Pennsylvania Department of Environmental Protection (PA) |
| Philadelphia Air Management Services (PA) |
| Rhode Island Department of Environmental Management (RI) |
| South Carolina Department of Health and Environmental Control - Bureau of Air Quality (SC) |
| South Dakota Department of Environment and Natural Resources (SD) |
| Chattanooga-Hamilton County - Air Pollution Control Bureau (TN) |
| Knox County - Department of Air Quality Management (TN) |
| Memphis and Shelby County - Health Department (TN) |
| Nashville and Davidson County Health Department - Pollution Control Division (TN) |
| Tennessee Department of Environment and Conservation - Air Pollution Control Division (TN) |
| Texas Commission on Environmental Quality (TX) |
| Utah Department of Environmental Quality (UT) |
| Virginia Department of Environmental Quality (VA) |
| Vermont Air Pollution Control Division (VT) |
| Benton Clean Air Authority (WA) |
| Northwest Clean Air Agency (WA) |
| Olympic Region Clean Air Agency (WA) |
| Puget Sound Clean Air Agency (WA) |
| Southwest Clean Air Agency (WA) |
| Spokane Regional Clean Air Agency (WA) |
| Washington State Department of Ecology (WA) |
| Yakima Regional Clean Air Agency (WA) |
| Wisconsin Department of Natural Resources (WI) |
| West Virginia Division of Environmental Protection - Division of Air Quality (WV) |
| West Virginia Division of Environmental Protection - Division of Air Quality - Wheeling (WV) |
| Lake Michigan Air Directors Consortium |
| Mid-Atlantic Regional Air Management Association |
| Northeast States For Coordinated Air Use Management |
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