Which is not a means of preventing contamination of water sources?

• A. When filling the tank, keep the hose down in the pesticide mixture
• B. Use spill containment during filling
• C. Use proper nozzles and hoses
• D. Monitor for leaks and drips during handling

Answer: (A)

Contamination prevention hinges on stopping backflow and spills during pesticide handling. Keeping the fill hose immersed in the pesticide mixture can create a backflow path or siphon effect that, if pressure changes occur or if connections shift, may push pesticide toward water sources. That increases the risk of introducing contaminants into water.

In contrast, spill containment during filling helps keep spills from reaching the environment, using proper nozzles and hoses minimizes leaks and drips, and monitoring for leaks during handling allows problems to be addressed before any pesticide reaches water. These practices all actively reduce the chance of water contamination.