Illinois Dept of Public Health
(office of health protection)
Environmental Health
Phone: 217-782-5830
National Ground Water Association
800-551-7379
Water Quality Association
630-505-0160
Water Systems Council
Wellcare Hotline 888-395-1033
Illinois Groundwater Association
Champaign, IL 61820
217-244-2458
Champaign, IL 61820-7495
217-333-9043
American Ground Water Trust
800-423-7748