Question

The maximum permissible concentration of fluoride in drinking water is

• A. \(0.5\ \mathrm{mg/L}\)
• B. \(1.0\ \mathrm{mg/L}\)
• C. \(1.5\ \mathrm{mg/L}\)
• D. \(2.5\ \mathrm{mg/L}\)

Hint:

BIS drinking water standards: \[ \boxed{ \begin{aligned} \text{Acceptable limit} &= 1.0\ \mathrm{mg/L}\\ \text{Permissible limit} &= 1.5\ \mathrm{mg/L} \end{aligned} } \]

Answer 1

The Correct Option is C

According to BIS IS 10500 drinking water standards, the acceptable fluoride concentration is \(1.0\ \mathrm{mg/L}\), while the maximum permissible limit in the absence of an alternate source is \[ \boxed{1.5\ \mathrm{mg/L}} \] Hence, \[ \boxed{1.5\ \mathrm{mg/L}} \] is the correct answer. Therefore, \[ \boxed{(C)} \]