A recent analysis by the Upper Mississippi River Basin Association shows an overall improvement in water quality in the Upper Mississippi River System from 1989 to 2018. While heavy metals and phosphorus levels have decreased, rising levels of nitrogen and chloride, mainly from road salt, pose challenges to aquatic life.
Water quality on Mississippi River improving, with a ways to go wpr.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from wpr.org Daily Mail and Mail on Sunday newspapers.
How Clean Is the Upper Mississippi River? New Report Finds Signs of Improvement, Emerging Threats goodmenproject.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from goodmenproject.com Daily Mail and Mail on Sunday newspapers.