What buffer distance is required between public water sources and application sites?

• A. 50 feet
• B. 100 feet
• C. 500 feet
• D. 200 feet

Answer: (D)

Buffer zones protect drinking-water sources by keeping pesticide applications at a safe distance from wells, intakes, and other public water sources. This spacing helps minimize the chance that spray drift, runoff after rain, or pesticides moving through the soil could reach the water supply. The distance is chosen to reduce exposure given typical pesticide properties, weather conditions, and site factors, aiming to lower risk to the public. A commonly applied minimum for protecting public water sources is a substantial buffer, roughly two hundred feet, which is larger than smaller distances and helps ensure the water source remains uncontaminated under normal application conditions. Always follow the product label and local regulations, because some products or situations may call for larger buffers or specific requirements. If you can’t meet the buffer, consider adjusting timing, choosing lower-risk products, or implementing additional containment measures to protect water sources.