In post disaster phase, for ensuring safe water supply, it is advisable to have a Residual Chlorine Level of
Level of residual chlorine to be maintained in all water bodies in post-disaster phase is > 0.7 mg/l (> 0.7 ppm).
0.3 mg/ litre
0.5 mg/ litre
0.7 mg/ litre
3.0 mg/ litre