DEQ - What is a Community Public Water Supply?

Michigan Department of Environmental Quality

Michigan.gov, Official Web Site for the State of Michigan


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What is a Community 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, 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.


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