Safe Drinking Water Act

[AI summary unavailable — showing source text] Safe Drinking Water Act - Defines the terms used in this Act. Directs the Administrator of the Environmental Protection Agency to publish proposed national interim primary drinking water regulations within 90 days after the date of this Act's enactment. Makes provisions for national drinking water regulations including the determination of maximum contaminant levels. Declares that for purposes of this Act, a State has primary enforcement responsibility for public water systems during any period the State meets the criteria set forth in this Act as determined by the Administrator. Provides for civil actions to require compliance by any State failing to assure enforcement of drinking water regulations. Allows a State to grant variances from an applicable national primary drinking water regulation to one or more public water systems within its jurisdiction. Permits a State which has primary enforcement responsibility to exempt any public water system within the State's jurisdiction from any requirement respecting a maximum contaminant level or any treatment technique requirement, or from both, of an applicable national primary drinking water regulation upon a finding that (1) due to c…