Pl answer

Asked by jain.pradeep | 26th Feb, 2020, 10:00: AM

Expert Answer:

According to World health organisation(WHO), Fluoride concentration should be in between 0.5 to 1 PPM in drinking water, Fluoride concentration above 1PPM is harmful for teeth and bones.

Answered by Ravi | 26th Feb, 2020, 11:26: AM