What precaution should be taken regarding treated water affected by rotenone?

Rotenone is a potent pesticide used primarily as a fish toxicant, and it affects the respiratory system of fish, leading to their demise. When discussing precautions related to treated water where rotenone has been applied, it is critical to emphasize that any fish that are killed as a result of this treatment should not be consumed. This is important due to health concerns that arise from the potential accumulation of rotenone in the tissues of the fish. Consuming these fish could pose health risks to humans, making it essential to avoid harvesting and eating fish from waters treated with rotenone until a recovery period has passed and the water is deemed safe.

In the context of the other options presented, they do not align with the safety standards recommended for handling water treated with rotenone. For example, the immediate consumption of water by pets or humans is not advisable due to the potential toxicity of rotenone. Additionally, suggesting that treated water could be used for irrigation without restrictions ignores the risks posed by the pesticide. Safety protocols must be followed to avoid any negative impacts on health and the environment.