Except as specified under § 5-102.12, water from a PUBLIC WATER SYSTEM or nonPUBLIC WATER SYSTEM shall meet the requirements of ch. NR 809, Safe Drinking Water, governing standards for safe drinking water as enforced by the department of natural resources. P
Wis. Admin. Code Department of Agriculture, Trade and Consumer Protection 5-102.11
You can contact the department of natural resources at bureau of drinking water and groundwater, P.O. Box 7921, Madison, WI, 53707, or http://dnr.wi.gov/topic/drinkingwater/contact.html.