Although recent declines in nitrate in the Illinois River are promising, increasing nitrate levels at other sites throughout the basin are a continuing cause for concern.
Nitrate levels in the Illinois River decreased by 21 percent between 2000 and 2010, marking the first time substantial, multi-ye...
These images show a stretch of the Mississippi River just south of Memphis, Tennessee. The top one was taken by a NASA satellite on August 8, 2012, and the bottom one by a different NASA satellite on August 14, 2011. See how there are huge patches of light tan along the river in the i...