Any discernible, confined, and discrete conveyance from which pollutants are or may be discharged is defined as which term?

• A. Nonpoint source
• B. Area source
• C. Mobile source
• D. Point source

Answer: (D)

The key idea is identifying pollution coming from a specific, identifiable channel. A point source is a discernible, confined conduit—like a pipe, outfall, or ditch—through which pollutants are discharged into a water body. Because the discharge originates from a single, discrete source, it fits this term precisely. In contrast, nonpoint sources are diffuse and come from many places, not one identifiable conduit. A mobile source refers to pollution from moving vehicles, not a stationary discharge, and an area source implies emissions from a defined area without a single discrete discharge point. So the term that best matches the description is point source.