National Ground Water Association
http://www.ngwa.org

USGS Ground Water Information
http://www.usgs.gov/ogw

Ground Water Protection Council
http://www.gwpc.org/

Ground Water Climate Response Network
http://groundwaterwatch.usgs.gov/

American Society of Civil Engineers
http://www.wef.org/MembershipCareers/Membershipinformation/CommitteeList/GroundwaterCommittee.htm

Interstate Council on Water Policy
http://www.Icwp.org

Water Environmental Federation
http://weforg/GovernmentAffairs/PolicyPositionStatements/Groundwater.htm

EPA Ground Water & Drinking Water
http://www.epa.gov/safewater/

Ground Water Rule
http://www.epa.gov/safewater/disinfection/gwr/index.html