Water from precipitation (rain, snow, hail, sleet) falls on the land and runs over the surface collecting in rivers, streams and lakes, and ultimately drains into oceans

Areas where waterborne refuse material from mining operations is pumped to allow the sedimentation of solids from the water

Contamination from one country impacts another country by crossing its borders

The process by which plants send water up through their stems, and deliver it from their leaves back into the atmosphere

Water that loses its transparency due to the presence of suspended particulates