Question

The maximum permissible chlorine contents for public supplies should be between:

• A. 0.1 to 0.2 ppm
• B. 0.3 to 0.4 ppm
• C. 1.2 to 4 ppm
• D. 6.5 to 8 ppm

Answer 1

Answer:

A. 0.1 to 0.2 ppm