Municipalities
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Drinking water security and emergency preparedness
If you are currently experiencing an emergency:During normal office hours, contact your DNR Rep. If you don’t know your rep, you can look them up on the DWS portal.After hours/on the weekend/holiday – contact 608-576-5358 to talk to the officer on…
- Webpage
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…
- Webpage
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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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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Drinking water administrative codes
Wisconsin Administrative Codes that relate to private and public drinking water are provided on this page as links to the Wisconsin Legislative website. To request an official paper copy of a specific code, follow the instructions on the Wisconsin…
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Risk & Resilience Assessments and Emergency Response Plans (AWIA Section 2013)
Section 2013 of AWIA requires community water systems that serve a population of 3,300 or more to conduct a risk and resilience assessment and develop an emergency response plan that must be updated and certified every five years.These requirements…
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Source water protection
Source water protection helps prevent contaminants from entering sources of drinking water. It's the first line of defense to reduce the chance that contaminants will be in a glass of water from your tap. Source water protection avoids potential…