City of Madison Logo
Water Utility Header

Winner - Best Tasting Water in Wisconsin, 2013 WWA State Fair competition

Water Quality


Madison Water Utility takes the quality of our water very seriously. We routinely collect more samples and run more tests than are actually required by the EPA and DNR.

Our drinking water more than meets all federal and state drinking water standards. Take a look at our Annual Water Quality Report (PDF)

Water Utility employee tests water sample









What’s the water quality like in your home? Find out the water quality for wells serving your address.

Water quality concerns? Call our Water Quality Hotline at (608) 266-4654.


We regularly flush our water mains in the spring and summer months to push out naturally-occuring iron and manganese sediment that comes from our aquifer. But that action -- or any other disturbance like fire suppression, a main break, contractor work, or a flow test -- can temporarily stir up the sediment that causes discolored water. If your water becomes discolored, run a cold water tap in the basement at full force until the water clears. Usually it clears in just a few minutes.


Chlorine is used in very small amounts to destroy harmful water-borne viruses, bacteria and microbes. MWU tests the water daily at every well to ensure chlorine leves are maintained as closely as possible to the required 0.3 parts per million.


MWU began adding fluoride to Madison's water in 1948 at the direction of the Common Council. The move was part of a city policy to reduce the risk of dental cavities, particularly for children with little access to routine dental care. Madison Water Utility currently follows the recommendation of Public Health Madison Dane County with regard to fluoride levels added to drinking water.

More questions? Take a look at the 2014 PHMDC policy statement on Fluoridation of Public Drinking Water (PDF) posted on its website.


The City of Madison drinking water system consists of 22 active wells, 30 reservoirs (including five elevated water towers), and approximately 840 miles of interconnected water transmission and distribution mains. The Water Utility pumps ground water from a deep sandstone aquifer. Wells are 500-1100 feet deep and deliver water to localized regions of the city.

Stay informed!

Find us on Facebook


Button leading to twitter page


Check out what's happening Inside MWU

My City of Madison Account
Sign up for Drinking Water Quality news.

Subscribe now at: