Drinking Water & Water Quality

Drinking Water

Drinking Water
Information for public water users & private well users, drinking water operator certification, and more

Public Water Users
Drinking water permitting and compliance information, groundwater quality protection, and groundwater contamination notices

Private Well Users
Well water testing, common contaminants, well maintenance, septic system maintenance, location & construction of new wells, and groundwater contamination notices

Drinking Water Watch
Information regarding the water quality of community water supplies

Safe Water Wells Initiative
Information regarding common contaminants that affect drinking water sources

Right-to-Know
Regulations & laws, notifications, and more

Water Quality

Water Quality
Information for public water users & private well users, drinking water operator certification, and more

Concentrated Animal Feeding Operations (CAFOs)
Section 319 projects, Livestock Facility Investigation Annual Reports, and more  

Harmful Algal Blooms
Information regarding Algal Blooms (HABs), reporting HABs, monitoring HABs, and the statewide HAB program

Illinois Nutrient Loss Reduction Strategy
Information regarding state efforts to improve water quality at home and downstream by reducing nitrogen and phosphorus levels in our lakes, streams, and rivers.

Lake Notes Fact Sheets
Fact sheets about aquatic exotics, determining your lake's watershed, Illinois lakeshore birds, shoreline stabilization, pressure treated wood, zebra mussels, waterborne pathogens, and more

Source Water Assessment and Protection
Information regarding protection of public water supply sources

Source Water Assessment and Protection Web Mapping Tool 
Inventory of private wells and public water systems 

Water Regulations
Wastewater regulationsdrinking water regulations, groundwater, and more