National Environmental Health Association (NEHA
Agency for Toxic Substances & Disease Registry
American Ground Water Trust
American Water Works Association
Association of Public Health Laboratories
Association of State and Territorial Health Officers
ATS Environmental
Centers for Disease Control and Prevention - NCEH
Food and Water Watch
Groundwater Consortium
National Association of County and City Health Officials
National Ground Water Association
National Onsite Wastewater Recycling Association (NOWRA)
National Water Research Institute
National Sanitation Foundation International (NSF)
Tetra Tech
The Private Well Class
Water Quality Association
Water Systems Council
Wellowner.org