A new interactive map released by the U.S. Geological Survey (USGS) provides access to river and stream water quality data from across the country. Data was collected since 1972 through the combined efforts of the USGS and 73 other organizations to assess a variety of critical water quality parameters to indicate the health of water resources. “The interactive map can be used to see whether 51 water-quality constituents, like nutrients and pesticides, and 38 aquatic-life metrics, like the types and numbers of fish, macroinvertebrates, and algae, have increased, decreased, or remained the same at nearly 1,400 sites between 1972 and 2012.” Moving forward, USGS will be using the compiled data to perform further detailed analyses, such as the historical effectiveness of pollution control investments and the risks to drinking water sources and aquatic ecosystems.