A factory discharging wastewater from a single pipe into a river is an example of which pollution origin?

• A. Non-point Source
• B. Diffuse Source
• C. Local Source
• D. Point Source

Answer: (D)

Pollution origin in water is categorized by whether it comes from a single outlet or from many diffuse sources. A factory discharging wastewater through one pipe into a river is a single, identifiable outlet, which makes it a point source of pollution. The defining idea is that you can point to one place where the pollutant enters the water, unlike nonpoint or diffuse sources where pollutants originate from numerous places across a landscape, such as runoff from streets, fields, and other surfaces. Point sources are easier to regulate because they have a specific discharge point, whereas diffuse sources are more spread out and harder to trace.