National Water-Quality Assessment (NAWQA) Project

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Featured Studies
Special studies on source-water and drinking-water quality
Surface-water intakes
General Information

Topical Studies of National Priorities

NAWQA is addressing five national priority topics that build an understanding of how natural features and human activities affect water quality, and establish links between sources of contaminants, the transport of those contaminants through the hydrologic system, and the potential effects of contaminants on humans and aquatic ecosystems. These topical studies are conducted in those Study Units most affected by these issues; they comprise a set of multi-Study-Unit designs for systematic national assessment. Included are studies on: 

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