Why were the Iowa atrazine management rules put in place?

• A. To minimize the tolerances of the pesticide
• B. To control hazardous waste from the cradle-to-grave
• C. To keep the economic injury level below the economic threshold
• D. To minimize the pesticide's impact on ground and surface water

Answer: (D)

These rules focus on protecting water quality. Atrazine can move from treated fields into groundwater or run off into streams, so Iowa creates requirements to reduce that risk and keep drinking water and aquatic ecosystems safe. The aim is to minimize the pesticide’s impact on ground and surface water by guiding when, where, and how it can be applied and in what amounts. The other options don’t fit because they concern residue tolerance levels, hazardous waste management, or pest-control decisions based on economic thresholds—areas not covered by atrazine water-protection rules.