Fecal microbes found in 60 percent of sampled wells, raising concerns about dairy manure, septic waste

Tests show waste from Kewaunee County’s 97,000 head of cattle contaminates majority of wells, especially after rainfall or snowmelt; human waste also a factor.

Milwaukee takes action to reduce lead in water; critics say it is not enough

The city of Milwaukee, with more than 70,000 lead service lines, has taken several steps in the past year to lower residents’ exposure to lead in drinking water, but activists say the city has not done enough.

Wisconsin DNR fails to update lead testing guidance in wake of Flint crisis

Nine months after the U.S. Environmental Protection Agency warned against flushing water systems before testing for lead, the state Department of Natural Resources has not yet passed that advice on to public water systems in Wisconsin.

‘Strict’ pesticide rules fail to erase threat to Wisconsin’s drinking water

A 2007 survey of private drinking water wells found 1 out of 3 had pesticides or their breakdown chemicals; farm groups oppose push for tougher atrazine rules.