After restoring water treatment capacity, what is the next essential step to ensure water safety?

• A. Immediately distribute bottled water without testing
• B. Test for contaminants
• C. Discontinue testing
• D. Increase chlorine dosage indefinitely

Answer: (B)

Testing the water for contaminants after restoring treatment capacity is the essential next step because it provides objective evidence that the water has returned to safe quality levels. By checking for microbial indicators, residual disinfectant, and other contaminants, you confirm that disinfection and filtration are effective and identify any remaining risks that require further treatment or protective actions. Without testing, distribution could spread unsafe water, and simply increasing chlorine without data may cause unnecessary exposure or fail to address non-chlorine contaminants. Discontinuing testing or distributing bottled water without validating the tap water’s safety won’t reliably ensure overall water safety.