The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about
A. 0.01 to 0.05 ppm
B. 0.05 to 0.5 ppm
C. 0.5 to 1.0 ppm
D. 1.0 to 5.0 ppm
Answer: Option B
This Question Belongs to Civil Engineering >> Environmental Engineering
The maximum permissible chlorine for public water supply should be between .1 to .2 PPM