Government Information

Earl Gregg Swem Library

Water Quality Changes in the Nation’s Streams and Rivers

Categories: Environment,Natural Resources,Statistics

https://nawqatrends.wim.usgs.gov/swtrends/

Interactive map product which allows users to get a long-term look at water quality changes in U.S. rivers and streams over time.  Covers 1400 sites from 1972 to 2012.  From the Geological Survey