On this page:
- Application Forms for the Installation of On-site Wastewater Systems
- Product Approval of an On-site Wastewater System
- Register of Product Approved On-site Wastewater Systems
- Guidelines for Land Capability Assessment for On-site Wastewater Management
- Recycled Water Systems
- Fact Sheets
Local Government Authorities in the Northern Territory have no jurisdiction over the approval of on-site wastewater systems, i.e. septic tank installations.
Conventional septic tank installations are predominantly certified by self-certifying plumbers or designers, though the administrative process is dependent on whether the installation is located within a Building Control Area (urban areas and along main highways) or outside Building Control Areas (i.e. remote areas).
Environmental Health administers the provisions of the Public and Environmental Health Act and Regulations with respect to all on-site wastewater systems located outside Building Control Areas, and also processes Notifications & Site-Specific Design Approvals for alternative septic tank systems within Building Control Areas. Environmental Health may also approve conventional septic tank installations, particularly those on grant-funded indigenous housing projects.
|Code of Practice for Small On-Site Sewage and Sullage Treatment Systems and the Disposal or Reuse of Sewage Effluent||11 Nov 1996||7 Dec 2012|
The Code of Practice for Small On-site Sewage and Sullage Treatment Systems and the Disposal or Reuse of Sewage Effluent is the design manual for on-site wastewater management in the Northern Territory. This document is also available in hard copy from Environmental Health who can be contacted on (08) 8922 7152.
This form includes the "Certification of installation of a Septic Tank outside of a Building Control Area" form
|Notification for the Installation of a Product Approved Alternative Septic Tank System (ASTS) for a single residential dwelling in a Building Control Area (S4) (Adobe PDF document - 45KB)||Sep 2011||S4|
|Application for Site Specific Design Approval of an ASTS (S5a) (Adobe PDF document - 334KB) | DOCX (190KB)||Feb 2014||S5a|
|Notification of Installation Completion of a Design Approved ASTS (S5b) (Adobe PDF document - 161KB) | DOCX (91KB)||Feb 2014||S5b|
|Notification for the Installation of a Ventilated Improved Pit Toilet (S11) (Adobe PDF document - 27KB)||Nov 2012||S11|
All on-site wastewater systems require product approval from the Department before marketing, sale or installation in the Northern Territory. Product approval provides authorisation for the sale or use of pre-manufactured products anywhere in the Northern Territory. This is subject to local conditions imposed through site-specific design approvals by the Chief Health Officer.
Pre-manufactured products include septic tanks, aerated wastewater treatment systems (AWTS), greywater reuse systems, composting toilets and biological filter systems.
An application for Product Approval of an on-site wastewater system must be submitted to the Director of Environmental Health. It must be accompanied by the relevant fee and information detailed in the application form.
|Application for Product Approval on an On-Site Wastewater System (S1)||Mar 2009||S1|
|Register Name||Last Updated|
|Greywater Diversion Devices||Jan 2013|
|Greywater Treatment Systems (Adobe PDF document - 15KB)||Sep 2013|
|Septic Tanks||Mar 2013|
|Sewage Ejection Pump Stations (Adobe PDF document - 15KB)||Jan 2013|
The Department of Health has developed "Guidelines for Land Capability Assessment for On-site Wastewater Management" to assist proponents of unsewered development proposals to:
- assess the capability of the site to sustainably manage wastewater within allotment boundaries;
- identify public and environmental health impacts of on-site wastewater management and in particular the effect on groundwater and surface water on sites; and
- identify management programs to minimise these impacts; in addition to best practice regulation.
|LCA Onsite Wastewater Management Guidelines (Adobe PDF document - 1439KB) | DOCX (1381KB)||Mar 2014|
|LCA Guidelines - Gazettal Notice (Adobe PDF document - 290KB)||Mar 2014|
Recycled water is an integral part of ensuring a sustainable water supply in the Northern Territory. With the changes and improvements in technology, the effect of climate change on water resources, population growth and the increasing price of water, future demand for recycled water is expected to rise.
In November 2006, the National Environment Protection and Heritage Council, the Natural Resource Management Ministerial Council and the Australian Health Ministers Conference released the Australian Guidelines for Water Recycling: Managing Health and Environmental Risks (Phase 1). These guidelines update and replace the National Guidelines for Sewerage Systems - Use of Reclaimed Water 2000 which are currently referenced in Part 5 of the NT Code of Practice for Small On-site Sewage and Sullage Treatment System and the Disposal or Reuse of Sewage Effluent.
The Guidelines for Management of Recycled Water Systems align the principles outlined in the Australian guideline to the DHF approvals process for large recycled water systems that generally service more than 150 EP. The news guidelines provide practical advice, including some examples, for obtaining approval to install and operate a recycled water system in the NT.