Guwahati Building ByelawsState Rules of Assam · 2010
Where a septic tank is used for sewage disposal, the location, design and construction of the septic tank shall conform to requirement of subsequent clause.
57.1 Location of septic tank’s subsurface absorption system: A subsoil dispersion system shall not be closer than 18 m from any source of drinking water, such as well, to mitigate the possibility of bacterial pollution of water supply. It shall also be as far removed from the nearest habitable building as economically feasible but not closer than 6 m. to avoid damage to the structure.