What are the main water quality parameters (pH, hardness, TDS) and how do they influence treatment decisions?

• A. pH affects corrosion control; hardness causes scaling; TDS influences taste and potential compliance; guide disinfection/filtration strategies.
• B. Temperature, color, and odor are the main parameters.
• C. Only pH matters; hardness and TDS are irrelevant.
• D. Salinity and turbidity solely determine treatment.

Answer: (A)