Which statement about buffer zones near water bodies is most accurate?

• A. They are optional and can be ignored if not near water
• B. They allow drift toward water bodies to be permitted under certain conditions
• C. They reduce risk only when soil is completely dry
• D. They are designed to protect water quality and aquatic life by reducing runoff and drift

Answer: (D)

Buffer zones are protective strips of vegetation or barriers placed around water bodies that intercept movement of pesticides from fields into the water. They work by slowing and filtering runoff, trapping sediment, and reducing spray drift from application equipment, so fewer pesticides reach the water. This is why the statement about buffer zones being designed to protect water quality and aquatic life by reducing runoff and drift is the most accurate. They aren’t optional near water, and their purpose isn’t limited to dry soil conditions—the buffer provides a protective effect across a range of conditions. In short, buffer zones act as a physical and biological barrier to keep contaminants out of water bodies.