Section 404 of the Clean Water Act

Surface Drinking Water Provided by Intermittent, Ephemeral, and Headwater Streams: Summary of the Analysis

A summary of the analysis detailing the percentage of surface drinking water from intermittent, ephemeral or headwater streams in the continental United States.

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Summary of the Geographic Information Systems Analysis of the Surface Drinking Water Provided by Intermittent, Ephemeral and Headwater Streams in the U.S (PDF)(2 pp, 77 K)