This page contains information about projects and work we are undertaking to improve the sewerage system in the district.
27/11/2013 3:31 p.m.
Since 2006, we have invested heavily in projects to address public concern about sewer spills into the harbour. The programme of work includes upgrading the wastewater treatment plant and wetlands, treating the spills at major sites and replacing and repairing components of the sewer network to reduce spills.
We are also working with the Northland Regional Council and others to tackle wider harbour pollution issues.
Wastewater treatment plant upgrade
We use ultraviolet light (UV) at the main treatment plant in Kioreroa Road to disinfect wastewater in the final stage of treatment. The treated water is then discharged into the wetlands in Limeburners Creek.
The existing UV lights can only treat flows up to the equivalent of a small storm. Currently during storms, the extra flows bypass the UV chamber and discharge directly into the wetlands or in very large storms, directly to Limeburners Creek. The upgrade will ensure that everything leaving the site has been disinfected.
A 2011 report outlining changes to the consent to upgrade the treatment plant can be downloaded by following the link below.
Application for Change to Consent - Additional Information [1.3mb]
Bream Bay sewerage system upgrades
Ruakaka South sewerage scheme
An upgrade of the sewerage system in Ruakaka South replaced aging septic tanks with a Pressure Sewer System. The last properties were connected to the scheme at the end of May 2013.
There are also other smaller wastewater schemes within the district where the pressure sewer system technology is being applied.
Information about pressure sewer systems can be found by following the link below.
On-Site Sewer Systems
Ruakaka treatment plant
If future growth of the One Tree Point and Ruakaka areas is maintained, the current treatment plant at Sime Road will not meet the predicted increase in sewage. A new treatment plant is needed to enable larger volumes of sewage to be treated to the higher standards required.
Over the last 3-4 years we have been talking with and listening to local people and community groups. Working with these groups, a preferred option of a new treatment plant with ocean outfall has been approved.
Further information can be viewed by following the link below.
Ruakaka Treatment Plant
Hatea storage tank
During large storm events the Hatea pumping station on Whareora Road was discharging rain diluted sewage into the Hatea River. To prevent this, an underground storage tank has been built next to the existing Hatea wastewater pumping station.
During storm events, when sewer pipes are full, the excess flow is diverted into the tank and stored. Once the storm has passed, the wastewater is pumped back into the sewer pipes to be treated at the main plant at Kioreroa Road.
The tank is sized to cope with most small storms and can store 1,000 cubic metres of wastewater. During larger storm events the wastewater is treated in the tank using ultraviolet light before being discharged into the Hatea River.
Work has been completed on a number of projects:
- upgrade of the Hatea sewer pump station and construction of a new storage tank
- upgrade of the Okara pumping station
- duplicate pipe between the Okara pumping station and the main treatment plant to allow treatment of greater volumes of sewage
- replacement of headworks at the main treatment plant to manage greater volumes of sewage
- hydraulic model of the sewer network to assist engineers
- completion of the Oakura sewer network
- completion of the Whangarei Heads sewer network.
Please follow the link below for information on how to connect into the Oakura or the Whangarei Heads sewer networks. Our expectation is that if your on-site system is failing, you will connect to the scheme as soon as practicable, otherwise your connection should be made over the next few years.
Connecting to the Sewer Network
If you would like further information about these projects, please contact us.