As per IS 10500: 1991, what is the permissible limit in the absence of alternative sources for the total hardness of drinking water?
1
600 mg/I
2
300 mg/I
3
800 mg/I
4
500 mg/I
As per IS 10500: 1991, what is the permissible limit in the absence of alternative sources for the total hardness of drinking water?