Wisconsin DNR Information Wisconsin DNR Information Drinking Water Publications Click below to read more information about specific contaminants that can be found in Wisconsin’s drinking water. The Wisconsin DNR documents supplied are in PDF format. Arsenic Drinking Water Standard – 10 ppb Read more Bacteria Read more Chromium Drinking Water Standard – 100 ppb Read more Well Water Tests Read more Copper Drinking Water Standard – 1.3 mg/L Read more Iron Drinking Water Standard – 0.3 mg/L Read more Lead Drinking Water Standard – 15 µg/L Read more Nitrate Drinking Water Standard – 10 µg/L Read more
