Which term best describes pollution arising from diffuse, widespread sources rather than a single discharge point?

Which term best describes pollution arising from diffuse, widespread sources rather than a single discharge point?

• A. Non-point source pollution
• B. Point source pollution
• C. Watershed
• D. Runoff

Answer: (A)

Pollution from many scattered sources is described as non-point source pollution. It happens when rainfall or snowmelt flows over large areas, picking up pollutants like fertilizers, pesticides, sediments, and oil from roads, lawns, and soil, and carries them into streams and lakes. Because there isn’t a single identifiable discharge point, it’s diffuse and more challenging to control. In contrast, point source pollution comes from one identifiable outlet, such as a pipe from a plant. A watershed is the land area that drains to a common water body and helps explain how contaminants travel, but it isn’t a pollution type itself. Runoff is the water movement that transports pollutants, but the term describes the process, not the source pattern.

Pollution from many scattered sources is described as non-point source pollution. It happens when rainfall or snowmelt flows over large areas, picking up pollutants like fertilizers, pesticides, sediments, and oil from roads, lawns, and soil, and carries them into streams and lakes. Because there isn’t a single identifiable discharge point, it’s diffuse and more challenging to control. In contrast, point source pollution comes from one identifiable outlet, such as a pipe from a plant. A watershed is the land area that drains to a common water body and helps explain how contaminants travel, but it isn’t a pollution type itself. Runoff is the water movement that transports pollutants, but the term describes the process, not the source pattern.