Section 404 of the Clean Water Act

Surface Drinking Water Provided by Intermittent, Ephemeral, and Headwater Streams: County Table

A table detailing detailing the percentage of surface drinking water from intermittent, ephemeral or headwater streams for each county in the continental United States.

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Analysis of the Surface Drinking Water Provided By Intermittent, Ephemeral, and Headwater Streams in the U.S: County Results (PDF)(31 pp, 4 MB)