- Agricultural Watershed Institute
- Centers for Disease Control
- DrinkTap
- IEPA Bureau of Water
- Illinois Department of Public Health
- Illinois State Water Survey
- Macon County Soil & Water Conservation District
- http://www.sws.uiuc.edu/USEPA Drinking Water
- USEPA Office of Water
- USEPA WaterSense
- USEPA Watersheds
- USGS Illinois District
- USGS Water Resources
