What is the salinity of rivers and streams in Montana?
In surface water systems (rivers, lakes, streams, etc.), the TDS varies from as low as only a few hundred parts per million (or milligrams per liter) in many western mountain areas, to as much as 2500 to 3000 parts per million (mg/L) during the lowest flow periods in some of the smaller prairie streams of eastern Montana. If you are interested in variability in TDS of a stream in your area, the United States Geological Survey has an extensive database of historical water quality information on streams and rivers across the U.S.
