This chapter applies to any person who has a water supply system with the capacity to make a withdrawal from the waters of the state averaging 100,000 gallons per day or more in any 30-day period, and to persons who withdraw more than 50,000,000 gallons of water per year from the waters of the state within the Great Lakes basin using a water supply system or systems on one property, or using a public water supply.
Wis. Admin. Code Department of Natural Resources NR 850.02