A Noncommunity Water Supply (otherwise known as a "Type II") is a water system that provides water for drinking or household purposes to 25 or more persons at least 60 days per year or has 15 or more service connections. A few examples are schools, restaurants, churches, campgrounds, industries and highway rest stops with their own water supply.

In contrast, a Community Water Supply (or Type I) is a water system that provides year-round service to at least 15 living units or 25 residents. Examples include cities, villages, apartment complexes and mobile home parks.

NonCommunity Public Water Supply Owner's Guide