What State agencies protect the groundwater?
A number of state agencies have authority under Wisconsin statutes and administrative rules to regulate activities that can affect groundwater quality. For example, the Department of Industry, Labor and Human Relations (DILHR) regulates underground petroleum storage tanks and septic systems. The Department of Agriculture, Trade and Consumer Protection (DATCP) regulates pesticide and herbicide mixing sites and application, animal feed lots, and fertilizer storage, handling, and mixing. The DNR regulates wastewater treatment systems, landfills and hazardous waste disposal sites, and spills.