Western Australian Current Regulations

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HEALTH (TREATMENT OF SEWAGE AND DISPOSAL OF EFFLUENT AND LIQUID WASTE) REGULATIONS 1974 - REG 43

43 .         Dry type septic tank

                Notwithstanding the provisions of any of the preceding Parts, where, for any reason, it is impractical to install any other type of treatment tanks, the Chief Health Officer may approve the installation of a “Dry Type” Septic Tank, which shall comply with the following conditions:

            (a)         the tank shall only be installed with the written approval of the Chief Health Officer and in a position approved by an authorised officer; and

            (b)         the tank shall be constructed as set out in Schedule 6, unless otherwise specified by the Chief Health Officer; and

            (c)         the tank shall not be within 6 m of any house, or 1.8 m of any boundary or 30 m of any well, creek or underground source of water; and

            (d)         the door of the privy shall be hung so that there is, when the door is closed, a clear space of at least 75 mm above and below it; and

            (e)         the wall of the privy opposite the door shall have a fixed glazed louvre of not less than 0.1 m 2 situated 1.8 m above floor level; and

            (f)         the pedestal pan shall be of an approved type, built into the floor of the closet and shall be provided with a close fitting lid; and

            (g)         the liquid capacity of the tank shall be at least 1 820 litres; and

            (ga)         the tank shall serve only residential premises with not more than 5 bedrooms; and

            (h)         effluent disposal shall be by one of the means set out in Part 7 except that a soak well may be reduced to 915 mm diameter and 1.2 m deep, a French or leach drain to 6 m minimum length, and an evaporation drain to 9 m minimum length; and

                  (i)         the educt vent shall be fitted with a mosquito proof cowl approved by the Chief Health Officer.

        [Regulation 43 amended: Gazette 29 Jun 1984 p. 1781; 15 Dec 1989 p. 4550; 29 Jul 1997 p. 4079 and 4083; 5 Sep 1997 p. 5037; 10 Jan 2017 p. 287‑8.]

        [Heading deleted: Gazette 29 Jul 1997 p. 4082.]



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