Chemical Water Pollution includes which of the following?

• A. Bacteria and viruses in water
• B. Pesticides and landfill waste
• C. Physical debris
• D. Noise pollution

Answer: (B)

The main idea is recognizing what counts as chemical pollutants in water. Chemical pollution involves substances that are chemicals dissolved or suspended in water and that change water quality. Pesticides are chemical compounds used in agriculture, and they can run off into streams and rivers. Landfill waste can release chemical contaminants into water through leachate that seeps into groundwater or surface water. Together, these examples illustrate how chemical substances contaminate water.

Bacteria and viruses are biological contaminants—living organisms that pollute water, not chemicals. Physical debris is physical pollution—solid trash or sediment. Noise pollution is an acoustic issue affecting aquatic life but not a chemical contaminant.