On-site Sewage Management Systems
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On-site Sewage Management Systems

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On-site sewage management systems are required in all areas where connection to the Sydney Water sewer network is not viable. Installing and operating an on-site sewage management system is a legally prescribed activity under Section 68 of the Local Government (General) Regulation 2005. This means that an approval to install and/or operate must be obtained from Council.
Applications to Install or Operate can be lodged online by clicking the ‘Apply for it’ button below.
apply for on-site sewage management systems

Applications to Operate an Existing System and Applications to Alter Existing Systems cannot be lodged online. Download a copy of the application and forward it to Council.

Installing a New System

A step by step guide for installing new on-site sewage management systems is available here. However, it is recommended that advice is sought from a suitably qualified professional when considering systems with on-site disposal/ recycling alternatives.

Please use the following checklist to ensure ALL relevant information is included as this will assist in prompt assessment of your application:

  • Ensure system is accredited by New South Wales Health and provide the relevant accreditation number.
  • Submit full manufacturer’s specifications.
  • Submit scaled plans of the full system, including vertical section.
  • For a pump out system, submit a basic site layout indicating the proximity to buildings, infrastructure and ease of access.
  • Submit a site plan at 1:200 scale (not required for pump out systems) which shows the following:
    • Property boundaries, buildings and other infrastructure (paths, decking, retaining walls, pools etc)
    • Site physical attributes, including rock outcrops, vegetation, watercourses (including drainage lines and dams) and slope (magnitude and direction).
    • Location of existing and proposed effluent management infrastructure, including existing tanks and disposal areas, proposed tank sites, Effluent Application Field (EAF) and Ecologically Sustainable Development (ESD) Areas.
    • Disposal field layout within the EAF area showing buffer distances to pertinent site features.
    • Location of test pits within the EAF area.
  • Submit an Onsite Wastewater Management Report (not required for pump-out systems) which includes the following:
    • A description of the soil depth, type, stability, presence of acid sulphate soils and drainage
    • Water table level
    • Average land slope
    • Flood levels
    • Site drainage
    • Environmentally sensitive areas
    • Physical description of the treatment system and disposal/recycling option suitability based on the Rapid Evaluation Procedure for Onsite Wastewater Management (link).

Approval to Operate an Existing System / Approval to Alter Existing System

All onsite sewage management systems MUST have a current Approval to Operate. These are issued for up to three years depending on the type of system and assessment of risk.

Please use the following checklist to ensure ALL relevant information is included as this will assist in prompt assessment of your application:

  • Submit a Certificate of Compliance (or letter) from a Licensed Plumber or suitably qualified professional indicating that the system is operating in accordance with the relevant Australian Standards for onsite sewage management systems.
  • Attach a sketch or site plan, showing the location of the existing sewage management system, any related effluent/wastewater application areas and the known location of wastewater/stormwater fittings and drainage lines.


Onsite Sewage Management System Information

Further information on Onsite Sewage Management Systems is available in the Wollongong City Council Development Control Plan: Chapter E8: Onsite Sewage Management Systems, and factsheets shown below.


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