Residents
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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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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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Mercury Ban In K-12 Schools
Under a 2012 law, Wisconsin schools are required to remove all mercury from school facilities and grounds.
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Mercury Ban
Wisconsin Act 44 was signed in October 2009 and regulates the sale, distribution and use of specific mercury and mercury-containing devices to Wisconsin citizens, businesses, institutions and others, including specific requirements for Wisconsin K-…
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About Mercury
Mercury is a naturally occurring element (Hg on the periodic table) that is found in air, water and soil. It exists in several forms: elemental or metallic mercury, inorganic mercury compounds and organic mercury compounds. Elemental or metallic…
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Wildlife and Your Land
The Wildlife and Your Land series is designed to offer suggestions to you, the private landowner, on how to manage your land for wildlife. Each part of the series focuses on management practices that you can apply to your land, but first, let's…
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Wolves in Wisconsin
The DNR recently accepted applications for stakeholder seats on the Wolf Advisory Committee, and the application period is now closed. Thank you to everyone who applied.