Section 23(1)(b) in The West Bengal Mining Settlements (Health And Welfare) Act, 1964
(b)a water rate and a conservancy rate, payable by the owners of mines the employees of which reside within the area or areas in respect of which provision has been made by the Board-(i)in the case of water rate, for the supply of water, and(ii)in the case of conservancy rate, for the cleansing of private latrines, urinals and cesspools.