How do you find the number of pure drinking water units in karnataka or in your state

Let's be clear : Pure by the B.I.S. norms. B.I.S. is the central govt authority which issues ISI license to the "Pure" drinking water units. BIS also has a portal through which one can find out the number of units in his/her state. You can check this video :-

The same method can be used to find out in any state.