Drinking Water
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Drinking Water, Groundwater and Wells Publications
Publications listed by titleAnnual safe drinking water report (DG-045) [PDF]Answers to your questions about well filling and sealing (DG-016) [PDF]Arsenic in drinking water (DG-062) [PDF]
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Public notification rule
Public notification is an important part of the Safe Drinking Water Act (SDWA). The U.S. Environmental Protection Agency (EPA) made significant changes to the Public Notification Rule, which were added to Wisconsin Administrative Code, Ch. NR 809,…
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Information for public water system owners and operators
“Public Water System” means a system for the provision to the public of piped water for human consumption, if such a system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of…
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NR 809 safe drinking water standards update
The state's safe drinking water code ch. NR 809 Wis. Adm. Code will be revised to include federal PFAS maximum contaminant levels (MCLs), technical edits and updates to lead and copper. As information about these rule updates becomes available, it…
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Manure and drinking water
Livestock manure may infiltrate drinking water wells from field application, spills and weather events. Manure may contain fecal bacteria, viruses and nitrates that can cause acute illness, especially in sensitive populations such as infants, women…
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Drinking water and lead
Lead is a common metal. Although originally used in many consumer products, lead is now known to be harmful to human health if ingested or inhaled. It can be found in lead-based paint, air, soil, household dust, food, some types of pottery and…
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Laboratory testing
The Safe Drinking Water Act (SDWA) requires public water systems to test water supplies for bacteriological agents and chemical contaminants to protect the health of their consumers. The frequency and extent of testing is dependent on the population…
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Using the DNR’s web form for entering public drinking water results
Each laboratory needs to get a user id for each person that will be doing data entry on the DNR web form. This is an important security step, and allows us to make sure that each user is authorized to enter data on behalf of the laboratory. The user…
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Municipal water system disinfection
The vast majority of Wisconsin’s municipal water systems currently disinfect the water they deliver to consumers, killing viruses and bacteria that can unexpectedly occur. Learn if your municipal water system disinfects its water Here's how you…