U.S. Geological Survey http://news.stlpublicradio.org en Nitrate pollution in Mississippi River Basin remains at 1980s levels, despite reduction efforts http://news.stlpublicradio.org/post/nitrate-pollution-mississippi-river-basin-remains-1980s-levels-despite-reduction-efforts <p>A <a href="http://water.usgs.gov/nawqa/pubs/nitrate_trends/">new study shows</a> that despite decades of effort to reduce nitrate pollution in the Mississippi River Basin, concentrations remain as high today as they were in the 1980s.<br /><br />The U.S. Geological Survey conducted the study, which looked at nitrate levels at eight sites on the Mississippi, Iowa, Illinois, Missouri, and Ohio rivers.<br /><br />USGS hydrologist and study lead Lori Sprague said the next step will be to figure out where the pollution is coming from.</p> Tue, 09 Aug 2011 20:09:59 +0000 VĂ©ronique LaCapra 1833 at http://news.stlpublicradio.org Nitrate pollution in Mississippi River Basin remains at 1980s levels, despite reduction efforts