[...]...MS.NR.3.4.ASSESS.A Point vs Nonpoint Source Water Pollution Name _ Section 1: Short Answer Directions: Answer the following questions correctly 1 The addition of harmful chemicals or substances to water is called _ 2 _source water pollution occurs when the contaminant comes from an obvious source 3 Give three examples of a point source water pollutant 4 source water. .. source water pollution occurs when the contaminant comes from a source that is not easily identifiable or from a number of sources 5 Give three examples of a nonpoint source water pollutant Natural Resources Science: Water 11