Which statement best describes the difference between stormwater runoff and agricultural runoff in terms of pollutants and management approaches?

• A. Stormwater runoff is driven by urban surfaces and can carry oils, metals, and nutrients; agricultural runoff carries high nutrient and sediment loads; management includes BMPs like filtration, buffers, and timing of fertilizer.
• B. Both types are identical in pollutant loads and management approaches.
• C. Stormwater runoff carries only nutrients; agricultural runoff carries only heavy metals.
• D. Agricultural runoff is not managed.

Answer: (A)

The key idea is that the sources of pollution and the targeted cleanup approaches differ between urban stormwater and agricultural runoff. Urban stormwater is driven by impervious surfaces and roads, so it can carry oils, metals, grease, and other pollutants from cars and streets, along with some nutrients from lawn care. Agricultural runoff comes from fields and tends to bring high loads of nutrients and sediment due to fertilizer use and soil erosion, and it can also carry pesticides. Because these different pollutant profiles come from different activities, management is tailored accordingly: urban or stormwater controls focus on removing or slowing runoff and filtering pollutants through practices like filtration, buffers along waterways, and green infrastructure, while agricultural management emphasizes keeping nutrients on the land and reducing erosion through nutrient management plans and timing of fertilizer, along with soil conservation measures such as buffer strips and reduced tillage. The statement matches this real-world distinction.