Section 17(i) in Multi-Storeyed and Public Buildings Rules, 1973
(i)Ordinary buildings (Ground + I Floor, residential buildings, not exceeding four dwelling units or Commercial/Industrial/Institutional building not exceeding 300 square metres). - The waste water from the bath and wash-basin shall be used for ground-water recharge by organic filtration (by providing suitable filter media) depending upon the soil suitability or for recycling for toilet flushing as indicated for other buildings specified in item (ii) below, -
