Social & Preventive Medicine Minimum chlorine content of water after effective chlorination should be of which of the following concentration given below? A 0.5 mg/L B 5 mg/L C 0.05 mg/L D 50 mg/L 💡 Explanation Minimum chlorine content of water after effective chlorination should be of which of the following concentration given below? ✓ Correct Answer: A. 0.5 mg/L