- Blue-Green Algae
- Combined Sewer Overflow (CSO) Program
- Geothermal Program
- Groundwater Monitoring and Source Water Protection
- Hoosier Riverwatch
- Hoosier Water Guardian
- Indiana Beach Program
- Indiana Clean Lakes Program
- Indiana's Lake Michigan Programs
- Regional Water and Sewer Districts
- Source Water Protection
- Storm Water Permitting
- Watersheds and Nonpoint Source Water Pollution
- Wetlands, Lakes and Stream Regulation