Which statement about buffer zones is most accurate?

• A. Buffer zones are optional and carry no regulatory significance.
• B. Buffer zones are used to increase crop yield.
• C. Buffer zones have no effect on water quality.
• D. Buffer zones help limit pesticide movement toward water and protect aquatic habitats.

Answer: (D)

Buffer zones are protective areas around water bodies where pesticide applications are limited to reduce the chance of contamination. They work by minimizing spray drift during application and by slowing or filtering runoff so pesticides have less opportunity to reach streams, ponds, or groundwater. This keeps aquatic habitats safer and helps maintain water quality. The other statements miss the mark because buffer zones are required in many regulatory schemes and do have regulatory significance; they are not meant to increase crop yield, and they do affect water quality by reducing pesticide movement.