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 salt content of the water can be measured very precisely using the conductivity method. Salinity can also be measured with a hand held refractometer. A refractometer measures the change of direction or bending of the light as it passes from air to water. Light moves slower in water than air. The more salt in the water, the slower the light moves. You can see the effect of light bending (refracting) as it passes from the water into the air by placing a pencil in a glass of water. The pencil appears to bend where it enters the water.