The following water sources are not recognised by BASIX as alternative water sources:
- River or "raw" water
- On-site sewage management systems
Applicants are required to achieve their water savings target by nominating a recognised alternative water source or by improved water efficiency.
Note: Alternative Assessment is not available for groundwater or river water applications.
Groundwater is that part of the water system that exists beneath the earth's surface, including underground streams and aquifers. It is a significant source of water for agriculture and is also the main domestic water supply for many communities and properties.
Landholders may have a basic right to access groundwater beneath their property for domestic (household) and stock purposes, so BASIX does not award savings for connecting to it.
River or "raw" water
River water is a significant source of water for agriculture and is also the main domestic water supply for many communities and properties.
Applicants can still utilise river and raw water where available, subject to relevant approvals, however BASIX treats river water as a potential potable supply and does not award savings for connecting to this supply.
Onsite Sewage Management Systems
Sewage is wastewater that includes both greywater and blackwater. An "Onsite Sewage Management System" (OSMS) is a system that allows for the collection, treatment and disposal of a single households wastewater. They are also referred to as household wastewater treatment systems. Unlike greywater treatment systems, these systems do not treat water to a standard suitable for re-use and are therefore not recognized as an alternative water source.
Certain wastewater treatment systems require a nominated irrigation/landscape area for wastewater disposal purposes. BASIX does not require this nominated area be included in garden and lawn area calculations. To claim this concession, ensure that the area is clearly marked 'effluent disposal area' on the plans submitted to council.
All forms of wastewater are capable of transmitting disease and the installation of a wastewater treatment system requires approval by your local council. Contact your local council for further information.
Further information about household wastewater disposal and on-site sewage management systems is available from the Department of Local Government.