Hong Kong Regulations

BUILDING (STANDARDS OF SANITARY FITMENTS, PLUMBING, DRAINAGE WORKS AND LATRINES) REGULATIONS - REGULATION 40

Disposal of foul water

(1) Drains and private sewers, provided for the carriage of foul  water,
shall, where there is a public sewer provided for the carriage of foul water
at a suitable level and position within 30 m of the boundary of the lot on
which the building, for which such drains or private sewers are provided, is
erected, be connected to such public sewer. (L.N. 294 of 1976)

(2) Where there is no such public sewer, the Building Authority may, by order
in writing, require the owner of any building to provide a septic tank, a
cesspool or other approved facility. (L.N. 361 of 1980)