12.3%. According to our research of Illinois and other state lists there were 3 registered sex offenders living in Leaf River, Illinois as of April 15, 2017. The ratio of number of residents in Leaf River to the number of sex offenders is 144 to 1. Nearest city with pop. 50,000+: Rockford, IL (19.7 miles , pop. 150,115).
Water filters work by capturing the microscopic life that lives in abundance in freshwater. The consequences of drinking untreated water can be severe. Water that tastes fine can contain bacteria, parasites and protozoa that cause nausea, diarrhea, loss of appetite, fatigue and vomiting.
The Department of Energy's Hydropower 101 video explains how hydropower works and highlights some of the Water Power Program's efforts in R&D in this area (to see how a hydroelectric system works, see our How Hydropower Works page):