Ever wonder where your drinking water comes from? Its not just the kitchen faucet. Rivers and streams play an important role; 65% of our drinking water comes from rivers and streams. Once a community system pulls water from a river, the water is treated to federal and state purity levels before becoming our drinking water and being pumped and piped into our homes. The greatest level of change came in the 19th century as growth of cities forced new methods of distributing and treating water. While our drinking water is generally safe to drink, threats to rivers and drinking water are increasing because of pollution. De Hart Plumbing Heating and Cooling, serving Manhattan Kansas, Junction City Kansas and Wamego Kansas.