Non-point source pollution originates from which type of sources?

Non-point source pollution originates from which type of sources?

• A. Many diffuse sources across the landscape
• B. A single point discharge
• C. A municipal sewer line
• D. An industrial facility

Answer: (A)

Non-point source pollution comes from many diffuse sources spread across the landscape, rather than from one identifiable discharge. Rainfall and snowmelt wash pollutants from roads, lawns, farms, and construction sites into streams and lakes, so there isn’t a single outlet to point to. This makes it a widespread, hard-to-trace type of pollution. Common contributors include nutrients from fertilizers, pesticides, sediment from soil erosion, and oils or metals from cars and pavement. In contrast, pollutants entering water from a municipal sewer line, an industrial facility, or a single point discharge come from a definite, identifiable outlet. Those are characteristic of point source pollution.

Non-point source pollution comes from many diffuse sources spread across the landscape, rather than from one identifiable discharge. Rainfall and snowmelt wash pollutants from roads, lawns, farms, and construction sites into streams and lakes, so there isn’t a single outlet to point to. This makes it a widespread, hard-to-trace type of pollution. Common contributors include nutrients from fertilizers, pesticides, sediment from soil erosion, and oils or metals from cars and pavement.

In contrast, pollutants entering water from a municipal sewer line, an industrial facility, or a single point discharge come from a definite, identifiable outlet. Those are characteristic of point source pollution.