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Water-Quality Changes in the Nation's Streams and Rivers

March 3, 2019
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The Water-Quality Changes in the Nation's Streams and Rivers mapper provides results from the largest-ever assessment of water quality changes in the Nation's streams and rivers. More than 185 million water-quality records from over 600 Federal, State, Tribal, and local organizations were screened as part of this assessment. 

Interactive Water Quality Map Brings Together 40 Years of Water-Quality Data
Sources/Usage: Public Domain. View Media Details
The Water-Quality Changes in the Nation's Streams and Rivers mapper provides over 185 million water-quality records from Federal, State, Tribal, and local organizations.