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Drinking Water

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7/6/21 COVID-19 UPDATE: 

Thank you for your patience during the COVID-19 public health emergency. As staff at state agencies return to state office buildings, we anticipate operations will begin to resemble pre-pandemic conditions. However, we will continue to utilize online or virtual business practices that were found to be efficient over the past year.

Field work, including compliance inspections, continue to take place but you may notice an uptick in activity as conditions allow. In most cases, staff will continue to schedule pre-inspection calls with facilities to gather some of the information that would previously have been collected while on-site. These advance calls will also be used to discuss safety protocols for on-site visits that may be needed to complete all aspects of a compliance assessment.

Staff will keep their voicemails and availability messages up to date and will respond as they are able.

For the most up-to-date information, please visit our COVID-19 information webpage.

Safe, clean drinking water is what we expect when we turn on our faucets. The DNR's Drinking Water and Groundwater Program manages activities that affect the safety, quality and availability of drinking water to protect public health and our water resources.

Safe Water For All

Learn what the DNR is doing to protect water in Wisconsin from key contaminants.

Drinking water quality data

What’s wrong with my drinking water?

Diagnose your water concerns based on the symptoms you notice about your drinking water.

Plan submittal requirements

Submit plans for new construction or improvements relating to a public water system.

Drinking Water Laws and Rules

View Wisconsin Administrative Codes that relate to private and public drinking water.

Drinking water and groundwater publications

Drinking water, groundwater and wells publications.

Laboratory testing

The Safe Drinking Water Act requires public water systems to test water supplies to protect public health.

Public Water System Owners & Operators

Information for Municipal, Other-than-Municipal, Non-Transient/Non-Community and Transient/Non-Community Water Systems.

Is my business a public water system?

Many small businesses, including hotels, restaurants and manufacturing facilities, are public water systems.
Is my business a public water system?

Annual Drinking Water Report

Wisconsin Public Water Systems Annual Drinking Water Report.
Annual Drinking Water Report

NR 809 safe drinking water standards update

A safe drinking water supply is a constant DNR priority for the protection of public health.
NR 809 safe drinking water standards update

NR 811 COMMUNITY WATER SYSTEM OPERATION AND DESIGN UPDATES

The purpose of ch. NR 811, Wis. Adm. Code is to provide safe and secure water for the residents of Wisconsin.
NR 811 COMMUNITY WATER SYSTEM OPERATION AND DESIGN UPDATES

America's Water Infrastructure Act (AWIA)

AWIA was signed into law and is an amendment to the Safe Drinking Water Act.
America's Water Infrastructure Act (AWIA)

Drinking Water & Groundwater Study Group

The group serves as a forum for the program to receive input from and provide information to stakeholder organizations.
Drinking Water & Groundwater Study Group

Source water and wellhead protection

Source water protection helps prevent contaminants from entering sources of drinking water.
Source water and wellhead protection

PFAS Contamination

Perfluoroalkyl and polyfluoroalkyl substances are a large group of human-made chemicals that may be in drinking water.
PFAS Contamination