Which pair correctly matches storage/dispensing setback distances for water sources?

• A. Public wells 400 ft; Private wells 75 ft; Surface water 75 ft; Public surface water 400 ft
• B. Public wells 75 ft; Private wells 400 ft; Surface water 75 ft; Public surface water 0 ft
• C. Public wells 75 ft; Private wells 75 ft; Surface water 400 ft; Public surface water 400 ft
• D. Public wells 400 ft; Private wells 400 ft; Surface water 400 ft; Public surface water 400 ft

Answer: (A)

Setbacks from where pesticides are stored or dispensed are designed to protect drinking water and surface water from contamination. The protection level depends on the type of water source: larger buffers are used for sources that serve the public or are more critical to water supply, while smaller buffers apply to private wells or non-public surface water.

In this pattern, public wells require the largest distance (400 ft) to guard municipal water supplies. Private wells have a smaller buffer (75 ft) since they serve individual households. Surface water that is not a public water source also has a smaller buffer (75 ft). Public surface water sources, which feed municipal systems, require the large 400 ft setback to minimize contamination risk. The combination matches this approach: 400 ft from public wells, 75 ft from private wells, 75 ft from surface water, and 400 ft from public surface water.

Options that assign 0 ft to public surface water or swap the 400 ft and 75 ft distances inappropriately would undermine protection for the higher-risk public water sources.