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Valid onsite wastewater treatment system certificate holders are listed on Onsite wastewater systems.
Onsite wastewater management systems (commonly known as septic tanks) are used on residential, community and business premises. They treat, then recycle or dispose of:
These include only sites that produce flows under 5000 litres a day. Systems that handle, or are designed to handle, higher flow rates need an EPA works approval.
Onsite wastewater treatment systems must perform effectively and be well managed to minimise risks to public health and the environment. The requirements on them depend on the source of the wastewater, site constraints, treatment method and the quality of effluent needed for the end uses of the treated water:
The Environment Protection Act 1970 (EP Act) sets out the approval process for onsite wastewater systems with flow rates less than 5000 L/day:
EPA approves system types in line with Australian Standards 1546.1 to 1546.4. The four approved types are:
Treatment system brands and models must be certified by an accredited conformity assessment body (CAB) as conforming to the relevant AS. This accreditation is given by JAS-ANZ (the Joint Accreditation System of Australia and New Zealand). As part of a permit application to a council, the applicant will need to include a copy of the certificate of conformity from a CAB.
Vermiculture systems will be certified against AS/NZS 1546.1 and dry composting toilets against AS/NZS 1546.2.
Interim standards for sand filters are included as a technical annex to the Code of practice – Onsite wastewater management (publication 891).
EPA will collate certificates of conformity and maintain a list of valid certificate holders against each treatment system type.
Page last updated on 6 Aug 2018