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Wastewater

Carterton District Council now holds new resource consents for the Carterton wastewater treatment and disposal activities. The new consents became operative on 19 January 2018 and are for a term of 35 years. Council’s long-term plan is to improve the treatment of urban waste water in a sustainable way. Its vision is to improve fresh water quality by removing treated effluent from streams.

Several new capital works are programmed to reduce effluent discharged into the Mangatārere Stream and to improve water quality, as required under the new consents. They include:

  • Earthworks in 2018 in preparation for an additional centre pivot irrigator in 2020/21 covering an area of 20 ha, giving a total irrigation area of 40ha.
  • Construction of a 200,000m3 effluent storage facility in 2018/19 to harvest inflows at times of the year when it is too wet to irrigate to land and to manage stream discharges to times when the stream is in high flow (2018/19)
  • Construction of a new discharge pipeline in 2019/20
  • Reconfiguration of flow distribution channels at the existing treatment wetlands to be followed by replanting.

Details of capital works programme to be completed under the new consents is summarised in our September 2018 update.  To view the newsletter please click here.

Upgrade works completed on Daleton Farm since 2014 include:

  • A centre pivot irrigator on the upper terrace of Daleton farm covering an approx. area of 20 ha
  • Dripline irrigators adjacent the SH2 boundary
  • Native shelter plants and a pinus radiata windbreak around Daleton Farm which will be irrigated with drip-lines when necessary.
  • A new high capacity ultraviolet (UV) treatment plant
  • Construction of a cover over the existing anaerobic digester from which accumulated,  malodorous gases are treated through a soil/bark filter

Working with our community

Urban residents can help reduce the amount of water and pollutants going into the wastewater system by:

  • Conserving water throughout the household
  • Making sure downpipes are not illegally connected to the sewerage system
  • Ensuring low-lying gully traps are raised above ground level
  • Carefully disposing of wipes, nappies, sanitary goods, chemicals, fats, oils, medicines, plastics; through means other than the wastewater system
  • Using phosphate-free detergent

Council will continue to work with the community towards achieving its vision through a new Advisory Group comprising Iwi, Mangatārere Restoration Society, Wairarapa Public Health, Sustainable Wairarapa, Greater Wellington Regional Council and Carterton District Council. The Advisory Group will be tasked with assisting Council to identify further improvements to WWTP treatment technology and future mitigation, disposal and reuse options.

The community is also closely involved in helping restore the Mangatārere Stream through Council’s partnership with the Mangatārere Restoration Society.

Have your say

We welcome comment and discussion to help achieve the best practicable outcomes for the people of Carterton and the environment.

For further information please contact:

Wastewater Project Manager
Email info@cdc.govt.nz
or write to Carterton District Council, PO Box 9, Carterton.