2Repealed by the *Environmental Protection (Liquid Waste) Repeal Regulations 2003*.

2 Repealed by the Environmental Protection (Liquid Waste) Repeal Regulations 2003.

3 Under the Alteration of Statutory Designations Order (No. 3) 2001 references in any law to the Health Department shall be read as references to the Department of Health.

4 Now known as the Health (Treatment of Sewage and Disposal of Effluent and Liquid Waste) Regulations 1974; citation changed (see note under r. 1).

5 The Bacteriolytic Treatment of Sewage and Disposal of Effluent and Liquid Waste Amendment Regulations 1989 r. 32 is a transitional provision that is of no further effect.

6 The Treatment of Sewage and Disposal of Effluent and Liquid Waste Amendment Regulations (No. 2) 1997 is a transitional and savings provision that is of no further effect.

7 If, because of an error made in r. 2, the Health (Treatment of Sewage and Disposal of Effluent and Liquid Waste) Amendment Regulations 2004 did not come into operation before 24 Aug 2004, the amendments were made on that day by the Health (Treatment of Sewage and Disposal of Effluent and Liquid Waste) Amendment Regulations (No. 4) 2004, but otherwise the Health (Treatment of Sewage and Disposal of Effluent and Liquid Waste) Amendment Regulations (No. 4) 2004 do not come into operation.

Defined terms

[This is a list of terms defined and the provisions where they are defined. The list is not part of the law.]

Defined term Provision(s)

adopted Code 3

aerobic treatment unit 3

alternating system 3

apparatus 3

approval 3

approved 3

approving body 3

AS 3

authorised person 3

blackwater 3

blackwater system 3

Building Code 5(5)

certificate of compliance 3

combined system 3

drainage plumbing work 3

dwelling 3

effluent 3

fittings 3

fixtures 3

greywater 3

greywater system 3

infiltrative area 3

interfere 18(1)

liquid waste system 3

liquid wastes 3

local government report 4A(1)

minimum flush fixtures and fittings 38(1)

non‑alternating system 3

owner 3

plumbing standards 3

prescribed time 10(6)

receptacle for drainage 3

relevant local government 3

residential premises 3

sedimentation tank 3

septic tank 3

single dwelling 3

wastewater 3

This work is licensed under a Creative Commons Attribution 4.0 International Licence (CC BY 4.0). To view relevant information and for a link to a copy of the licence, visit www.legislation.wa.gov.au.

Attribute work as: © State of Western Australia 2025.

By Authority: GEOFF O. LAWN, Government Printer