What is the maximum residual concentration for chlorine dioxide to avoid taste and odor complaints?

The correct answer is based on established guidelines regarding the acceptable levels of chlorine dioxide in drinking water to prevent any adverse taste and odor experiences for consumers. Research and regulatory standards have indicated that a maximum residual concentration of chlorine dioxide up to 0.04 to 0.05 mg/l is generally safe and effective without leading to noticeable taste or odor complaints.

This range ensures that the disinfection process remains effective while minimizing the potential for sensory issues that could arise from higher concentrations. While lower concentrations might also be acceptable, they may not be sufficient for effective disinfection in some cases, thus reinforcing the suitability of this particular range for consumer satisfaction and water quality standards.