Sewage and rain water to be separate.

For the purpose of effectual drainage of any premises in accordance with the provisions of this chapter, it shall be competent for the Municipality, or the concerned Department, or organization, of the State Government, or the agency, as the case may be, authorized in this behalf, to require that there shall be one drain for sewage, offensive matter and polluted water and an entirely separate drain for rain water or unpolluted sub-soil water or both rain water and unpolluted sub-soil water, each emptying into separate municipal drains or other suitable places. Provided that - (a) the sullage from bathrooms and kitchens shall be separately connected with the sewer main of the Municipality, and (b) the rain water shall be connected with the natural nul/ahs, khola-khotsas, jhoras, or storm water drainage.