Routine Water Quality Monitoring
Madison Water Utility routinely collects and tests water samples for a variety of biological (bacteria) and chemical contaminants that may be present in drinking water. Samples are collected at Water Utility facilities (unit wells, water towers, reservoirs, booster stations) and representative sample locations within the distribution system. The location and frequency of sampling varies by contaminant. Most, but not all, of this testing is performed to comply with the Safe Drinking Water Act. U.S. Environmental Protection Agency (EPA) and Wisconsin Department of Natural Resources (WDNR) have regulatory authority over the water quality monitoring performed by the utility. The amount of testing performed by Madison as part of its water quality monitoring exceeds the regulatory requirements established by EPA and WDNR.
View the 9/16/08 Report to the Water Utility Board on Annual Water Quality Monitoring Results (PDF)
Water Utility Facilities
The City of Madison drinking water system consists of 23 active wells, 31 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.
Distribution Sample Locations
Types and Frequency of Testing (PDF)
Water Quality Reporting
Testing results for 2008/2009 and information about substances being tested:
Find the Water Quality Report for the well(s) serving your home or business address.
