If we don't take care of it, it's very likely.
Oil, plastics, sewage, trash... these are just a few of the stuff we dump into our rivers and streams. Many natural streams are piped underground and cities are built over them. Runoff from these cities is flushed into storm drain, taking any oil and debris from the roads with it. When the water finally emerges from the t pipe, it’s grossly polluted... and those pollutants continue on contaminating all other water they come into contact with along the way until they finally flow into the oceans. Over-building and burying our trash (landfills) contaminates ground water (wells).
For as much water as there is on this planet, potable water is becoming more precious than gold… and nearly as hard to find.