Governing Law and Regulations
Wisconsin Department of Natural Resources (DNR) Division of Water Bureau of Drinking Water and Groundwater
Department of Agriculture, Trade and Consumer Protection (DATCP)
U.S. Environmental Protection Agency (EPA) Region 5
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. The Wisconsin Department of Natural Resources (DNR) has received primacy from the U.S. Environmental Protection Agency (EPA) to administer the federal drinking water requirements under the Safe Drinking Water Act (SDWA) in Wisconsin.
The state generally follows the federal standards for maximum contaminant levels (MCLs) for drinking water supplies. However, they have additional requirements as well, such as an MCL of 0.1 milligrams per liter (mg/L) for nickel. See the national section DRINKING WATER for more information about MCLs and other requirements under the SDWA.
The state requires ...