What is the purpose of drinking water treatment?

• A. To add minerals to improve flavor.
• B. To remove enough impurities from raw water to make it safe to drink.
• C. To increase water hardness.
• D. To reduce the cost of distribution.

Answer: (B)

The main goal of drinking water treatment is to remove enough impurities from raw water so the water is safe to drink and meets regulatory health standards. This means reducing a wide range of potential contaminants—microorganisms such as bacteria and viruses, turbidity (cloudiness), organic and inorganic chemicals, metals, and substances that affect taste or odor. Through steps like coagulation and flocculation to gather particles, sedimentation to let them settle, filtration to remove fine materials, and disinfection to kill remaining pathogens, the treatment process lowers contaminant levels to amounts allowed by safety limits. Additional steps may adjust pH, control corrosion, or add fluoride for dental health, but the core purpose remains making the water safe for consumption. The other options don’t reflect this primary aim: adding minerals for flavor, increasing water hardness, or cutting distribution costs aren’t what treatment is designed to accomplish.