| awma.org | Air & Waste Management Association (A&WMA ) |
| iswa.org | International Solid Waste Management Association (ISWA) |
| hmac.org | Hazardous Materials Advisory Council |
| costha.com | Conference on Transportation of Hazardous Articles (COSTHA) |
| astswmo.org | Association of State and Territorial Solid Waste Management Officials (ASTSWMO) |
| asiwpca.org | Association of State and Interstate Water Pollution Control Administrators (ASIW |
| asdwa.org | ASDWA - Association of State Drinking Water Administrators |
| amsa-cleanwater.org | Association of Metropolitan Sewerage Agencies (U.S.) |
| nowra.org | National Onsite Wastewater Recycling Association (NOWRA) |
| nswma.org | National Solid Wastes Management Association (NSWMA) |
United States , Virginia , Herndon