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National Aquatic Resource Surveys

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National Aquatic Resource Surveys

The National Aquatic Resource Surveys (NARS) are collaborative programs between EPA, states, and tribes designed to assess the quality of the nation's coastal waters, lakes and reservoirs, rivers and streams, and wetlands using a statistical survey design. The NARS provide critical, groundbreaking, and nationally-consistent data on the nation's waters.

Learn about the National Aquatic Resource Surveys
Link to individual National Aquatic Resource Survey pages
Data and Applications for the National Aquatic Resource Surveys

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