Types of wastewater system

Read below for information about how wastewater systems are classified.

On-site systems

An on-site wastewater system has a daily hydraulic flow of 8,000 litres or less.

Conventional on-site wastewater systems include septic tanks and holding tanks.

Alternative on-site wastewater systems include:

  • aerated wastewater treatment systems
  • biological treatment systems
  • composting toilet systems
  • hybrid toilet systems
  • pit toilets.

Installation requirements are determined by the type of on-site wastewater system and whether it will be installed:

Large scale systems

Large scale on-site wastewater systems and decentralised wastewater systems have a designed hydraulic load greater than 8,000 litres per day.

Before installing these systems, you will need wastewater works design approval.

Large scale systems may also require a Northern Territory Environment Protection Authority (NT EPA) waste discharge licence.

For more information go to the approvals and licences page at the NT EPA website.

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Last updated: 27 June 2017