Support document for designation of the Lewiston Basin aquifer as a sole source aquifer

Technical Report · Thu Sep 01 00:00:00 EDT 1988

OSTI ID:6280417

The Asotin County (Washington) Public Utility District petitioned the Environmental Protection Agency (EPA) to declare its drinking-water supply as a sole-source aquifer under Section 1424(e) of the Safe Drinking Water Act. In response, EPA prepared a document which briefly describes the geology, ground-water hydrology, and drinking-water consumption of the Lewiston Basin. The report describes the technical basis for EPA's decision to designate the Lewiston Basin Aquifer System as a sole-source aquifer. The Lewiston Basin is an approximately 500 square mile structural and topographic depression in southeastern Washington and western north-central Idaho, including part of the Nez Perce Indian Reservation. Ground water provides about 68% of the drinking water consumed in the Lewiston Basin. Community water supply wells all withdraw drinking water from the Grande Ronde Basalt. However, according to EPA guidelines, those supplies cannot economically serve all those who depend upon the aquifer system for drinking water.

• Research Organization: Environmental Protection Agency, Seattle, WA (USA). Office of Ground Water
• OSTI ID: 6280417
• Report Number(s): PB-89-158893/XAB; EPA-910/9-88/194
• Resource Relation: Other Information: See also PB--89-158885
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
29 ENERGY PLANNING
POLICY AND ECONOMY
AQUIFERS
LEGAL ASPECTS
DRINKING WATER
PUBLIC UTILITIES
WATER RESOURCES
WATER SUPPLY
BASALT
GROUND WATER
IDAHO
MAPS
POPULATIONS
WASHINGTON
WATER QUALITY
ENVIRONMENTAL QUALITY
FEDERAL REGION X
HYDROGEN COMPOUNDS
IGNEOUS ROCKS
NORTH AMERICA
OXYGEN COMPOUNDS
RESOURCES
ROCKS
USA
VOLCANIC ROCKS
WATER
520500* - Environment
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290400 - Energy Planning & Policy- Energy Resources