Is there lead in Madison's tap water?
1.8PPBLead in Madison Water Utility's water at the latest test, from June to September 2023
Below 15, the level that requires action
Below 15, the level that requires action
11 public water companies list Madison as a place they supply. The biggest is the Madison Water Utility, with about 272,000 people. The highest latest result among Madison's water companies is 7 parts per billion, at Mendota Mental Health Inst. None of the 11 with results was above 15 at its latest test. 1 found too little lead to measure. 7 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.