A public water system is defined as one that provides water for *human consumption, except those serving only one single family residence or four or fewer connections on the same farm (WAC 246-290-020).
This means that systems providing water to two or more homes, as well as most businesses with either employees or public access must meet higher standards than systems that serve only one home. As the number of people served by a system increases, so does the level of oversight needed to assure the provision of safe water to everyone. For example, a municipal water supply is required to conduct far more water quality testing and emergency planning than is expected of a system shared between two neighbors.
The Washington State Department of Health tracks water quality test results for public water systems in our state, excluding two-party wells. For information pertaining to a public water supply, visit Sentry Internet. You will need to know the water system’s name or ID number.
For more information pertaining to public water supply requirements, please click here.
*"Human consumption" means the use of water for drinking, bathing or showering, hand washing, food preparation, cooking, or oral hygiene. (source)