A bill to amend the Safe Drinking Water Act to extend the period for which variances may be provided in the case of contaminant level and treatment technique requirements of national primary drinking water regulations, and for other purposes.

Amends the Safe Drinking Water Act to replace specified references to "exemptions" with references to "interim variances" and to replace a reference to "exempt public water systems" with a reference to "public water systems granted interim variances."

Permits State-prescribed public water system schedules to require compliance with less stringent contaminant levels or treatment techniques during a period of interim variance. Mandates that such schedules require final compliance with each contaminant level and treatment technique requirement for which such interim variance was granted by a specified date. Sets such date at: (1) the later of January 1, 1988, or seven years after such requirement takes effect; or (2) in cases where the public water system has entered into an enforceable agreement to become part of a regional public water system, the later of January 1, 1992, or nine years after such requirement takes effect.

Permits a State with primary enforcement responsibility to determine that the best technology, treatment techniques, or other means need not be constructed and in place before a variance may be granted.