Where no sewer is available you will need to provide an on site system which has been designed and constructed in accordance with the On-site Effluent Treatment Regional Plan. The purpose of the OSET Plan is to ensure that wastewater is discharged safely and that the effects are managed.
The systems must have been tested and approved (see below approved systems).
If you are building a new home that will utilise on site systems, this will be approved as part of the building consent process.
Domestic wastewater treatment
Where there is no council sewer, such as in many rural communities, wastewater is generally treated with septic tank systems. However in some situations, like those described in this section, you may choose (or be required) to install an aerated wastewater treatment system, rather than use a traditional septic tank system with a soakhole or soakage trenches. This is to prevent degrading the quality of water in nearby water bodies.
- Managing your wastewater - building, buying and living in a property with an on-site wastewater treatment system.
Choosing an aerated wastewater treatment system
What is an aerated wastewater treatment system?
Systems similar to septic tank systems which provide 'on-site' treatment. However they treat wastewater to a much higher standard. They involve pre-treatment and secondary treatment involving aerobic biological processes. Some may also include tertiary treatment such as ultra-violet light disinfection.
What is happening in the Rotorua Lakes catchments?
Concerns about water quality in the Rotorua lakes means that there is a higher performance standard required for wastewater systems installed in the Rotorua Lakes' catchments. We are carrying out trials in Rotorua of aerated wastewater treatment systems to measure how they perform.
What are the approved aerated wastewater treatment systems for Bay of Plenty?
We have compiled a list of approved on-site effluent systems for new installations throughout the Bay of Plenty, including the Rotorua lake catchments here.
Note that for new systems in Rotorua to be installed as a 'permitted activity' they must also meet the requirements of Rule 13 and Schedule 4 of the Bay of Plenty Regional Council's On-Site Effluent Treatment Regional Plan.
If you are unsure if you are in one of the Rotorua Lakes catchments select 'Map 4' of the On-site Effluent Treatment Regional Plan.