What is a Public Water Supply?

Types of Public Water Supplies
Classification Description Examples
Type I Community Public Water Supply Provides year-round service to not less than
25 residents OR not less than 15 living units
Municipalities, Apartments, Condominiums, Nursing Homes, Mobile Home Parks
Type II Nontransient Noncommunity Public Water Supply Serves not less than 25 of the SAME
people for at least six months per year
Schools, Industries, Places of Employment
Type II Transient Noncommunity Public Water Supply Serves not less than 25 people OR not less than
15 connections for at least 60 DAYS per year
Hotels and Restaurants (with less than 25 employees), Campgrounds
Type III
Public Water Supply
Anything not considered a Type I or Type II water supply; serves less than 25 people AND 15 connections, or operates for less than 60 days per year Small Apartment Complexes and Condominiums, Duplexes, all Others
Private Water Supply Serves a single living unit Single Family Home


Type II noncommunity water supplies are also classified according to their water production.  Type IIa water supplies have an average production during the maximum month equal to or greater than 20,000 gallons per day.  Type IIb water supplies produce less than 20,000 gallons per day during the peak month.


Community Water Supply Listings