My neighborhood retention pond has a great deal of algae. Who should I contact about this?
Indiana Department of Environmental Management (IDEM) answers all environmental questions and concerns
Indiana Department of Environmental Management
100 N. Senate Ave.
Mail Code 50-01
Indianapolis, IN 46204‐2251
IDEM Main Phone Numbers:
• (317) 232-8603
• (800) 451-6027 (Toll-free within Indiana)
If you see something that should not be in the water or on the land, you can call the Environmental Emergency line 24
hours a day, seven days a week. To report Environmental Emergencies, 24 hours-a-day:
• (888) 233-7745 inside U.S.
(317) 233-7745 outside U.S.