Section 63 in Tamil Nadu Combined Development and Building Rules, 2019
63. Water Conservation.
(1)Rain Water Harvesting.- Effective measures shall be taken within each premises for conservation of rainwater, and rainwater-harvesting structures shall be provided as prescribed in Annexure - XXII of this Rule.(2)Additional regulations for all buildings. - (a) In the ground floor, floor level of water closets shall be at least 0.9 meter above the road level to ensure free flow.(b)All centrally air conditioned buildings shall have their own waste water reclamation plant and use reclaimed waste water for cooling purposes.(c)A separate sump shall be constructed for storing potable where the water is supplied by the Local Body and the volume of such sump shall not exceed 1,000 liters per dwelling unit. This sump shall be independent of other tanks, which may be constructed for storing water obtained from other sources.
