An example of a surface water supply would be?

A reservoir is a clear example of a surface water supply because it collects and stores water from precipitation, runoff, and rivers, making it readily accessible for various uses, including drinking, irrigation, and recreation. Reservoirs typically exist on the surface of the land and are designed to hold a significant volume of water over time.

In contrast, a well relies on groundwater sources located beneath the earth's surface, while both a rock and sand spring and an earth spring are sources of groundwater that emerge naturally to the surface but do not hold or store water in a manner typical of surface water bodies.