As per IS 10500 ∶ 2012, 'drinking water specifications', the acceptable limit for colour in the water is ____________.
1
15 Hazen units
2
5 Hazen units
3
10 Hazen units
4
20 Hazen units
As per IS 10500 ∶ 2012, 'drinking water specifications', the acceptable limit for colour in the water is ____________.