Illinois State Water Survey and Illinois State Geological Survey Cooperative Resources Report no. 20 published in 2005. Describes a network for monitoring pesticides in groundwater.

Campus Facilities and Services reports on the quality of campus drinking water supplies are issued annually by University of Illinois at Urbana-Champaign Facilities and Services.

The PSL analyzes water samples from household taps, wells, cisterns, lakes, and ponds throughout Illinois. Tests include calcium, magnesium, iron, arsenic, manganese, sodium, hardness, total dissolved solids, alkalinity, color, turbidity, fluoride, chloride, nitrate, and sulfate. Where lead (Pb) may be a concern (older homes, especially if lead pipes or solder present), the laboratory can provide additional testing. This lead testing is available to all homeowners in the state (municipal or private well supplies). The Public Service Laboratory does not perform analyses for bacteria, pesticides/herbicides, oils, or gases.

Illinois Department of Public Health

Contact your regional or local department for assistance with well testing, including test kits and lists of accredited laboratories.

A guide for private well owners published in 2014 by the Illinois State Water Survey. ISWS Circular no. 185.