The permissible limit of fluoride in drinking water as per ISI standard (IS : 10500-2003) is:
A. 2.0 ppm
B. 1.5 ppm
C. 1.0 ppm
D. 0.5 ppm
Answer:B
The permissible limit of fluoride in drinking water as per ISI standard (IS : 10500-2003) is:
A. 2.0 ppm B. 1.5 ppm C. 1.0 ppm D. 0.5 ppm