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The Safe Drinking Water Act requires states to report drinking water information periodically to EPA. This information is maintained in a federal database, the SDWIS Fed Data Warehouse. Included is basic information about each public water system, including: the system's name; ID number; city or county served; number of people served; type of system (residential, transient, non-transient); whether the system operates year-round or seasonally; and characteristics of the system's source(s) of water. SDWIS also include violation information and enforcement information including actions states or EPA have taken to ensure that a public water system returns to compliance if it is in violation of a drinking water regulation.

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Last Updated: July 31, 2017