DG
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Look Up Drinking Water Data
The Federal Safe Drinking Water Act (SDWA) standards apply to all water systems providing water for human consumption to the general public. This may include residences without a private well, as well as places of business that have their own well(s…
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The quality of Wisconsin's drinking water
Safe, clean drinking water is what we expect when we turn on our faucets. The Wisconsin DNR works to protect the quality and quantity of the state’s water resources and ensure the safety of drinking water. We're here to help you be better informed…
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Submittal requirements by project type
Common project document definitions/expectations:Cover letters should provide a general description of the need for the project and proposed scope of work. Cover letters may address previous project approvals or prior work done that is associated…
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Public water system plan review
Chapter NR 108, Wis. Adm. Code, allows the DNR up to 90 days to approve, return or deny submitted plans for new construction or improvements relating to a public water system. Average Review Process Timeframes Water Mains: 55-65 days All other…
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Laboratory analysis slips
The following are the most current sample lab analysis slips which are used for compliance with Safe Drinking Water Act regulations. Systems are mailed sampling slips as part of the normal mailing schedule. If you did not receive a slip or need…
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Identify your water’s symptoms
Diagnose your water concerns based on the symptoms you notice about your drinking water. Possible causes are listed with the most likely first. Get answers to these and more questions:
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Drinking water & groundwater quality standards/advisory levels
The Drinking Water & Groundwater Quality Standards/Advisory Levels [PDF] contains the tables:
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Wisconsin's Capacity Development Program
The Capacity Development Program aims to help public water systems strengthen their ability to consistently supply safe drinking water to their customers. The program focuses on assisting system owners and operators, particularly small water systems…
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Instructions for creating and customizing a Consumer Confidence Report using DNR’s CCR generator
Consumer Confidence Reports (CCR) are required by the U.S. Environmental Protection Agency (EPA). The CCR must be prepared and distributed by all Community Water Systems in order to provide information concerning water quality for the previous…
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Water Supply Service Area Planning
By 2026, all water utilities that serve a population of 10,000 or more people will be required to develop a Water Supply Service Area Plan (see s. 281.348, Wis. Stats.). Communities that may need to develop this plan prior to 2026 include: