Which statement describes a key health consideration when selecting water treatment chemicals?

• A. Side effects that endanger public health
• B. Tastes and odors
• C. Color
• D. Corrosion

Answer: (A)

Prioritizing health safety means evaluating whether a water treatment chemical could pose risks to people drinking the water. The key idea is that any chemical used must not introduce side effects that could endanger public health, such as toxicity, improper residuals, or harmful byproducts formed if the chemical is misused. Even if a chemical helps with taste, color, or odor, or reduces corrosion, those factors don’t directly address safety for consumers. The primary goal is to keep water safe and within health and regulatory limits, so health-related potential side effects drive the selection decision.