Which of the following lists represents daily activities contributing to nonpoint source pollution?

• A. Fertilizer Use, Car Washing, Pet Waste, Littering
• B. Industrial Discharges
• C. Power Plant Emissions
• D. Mining Runoff

Answer: (A)

Daily activities can contribute pollutants to waterways through diffuse runoff, rather than from a single identifiable pipe. This question focuses on actions people take every day that can send nutrients, oils, bacteria, and litter into storm drains and streams when it rains or when washed off surfaces.

Fertilizer use adds nutrients like nitrogen and phosphorus to soils. If there is rain or irrigation, those nutrients can be carried into nearby streams or lakes, fueling algal blooms and harming aquatic life. Car washing introduces soaps, oils, and metals into runoff from driveways and streets, which then flow into storm drains and waterways. Pet waste contains bacteria and nutrients that, when washed away by rain, can contaminate water bodies and degrade water quality. Littering creates physical debris and potentially harmful chemicals that can be carried by runoff, accumulating in streams and oceans.

The other options describe sources tied to specific facilities or activities that are not typical daily household practices. Industrial discharges, power plant emissions, and mining runoff are more characteristic of point-source pollution or industrial operations rather than everyday personal activities, so they don’t fit the idea of daily actions contributing to nonpoint source pollution as cleanly.