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The shortlist of options

We want you to choose from six options for discharging treated water to a range of environments: the Manawatū River, land, groundwater, and the ocean. Many of the options include a hybrid, where there would be a combination of different discharge locations.

We’ve spent a lot of time engaging experts, and local mana whenua, Rangitāne, to determine how we best manage, treat and discharge wastewater. Initially we identified 36 different options. A robust assessment and testing process considered a range of environmental, cultural, economic and social factors.

We settled on six options that we want you to have your say on

They are, in no particular order:

  • All treated wastewater is discharged to the Manawatū River, with improved removal of phosphorus and nitrogen.
  • Treated wastewater discharged to Manawatū River at Totara Road, and below Opiki Bridge, with some land application.
  • Treated wastewater applied to land, with discharge to the Manawatū River in exceptional circumstances
  • Treated wastewater applied to land, with some some discharge to the Manawatū River
  • Discharge to groundwater via infiltration, with land application in the drier months of the year
  • Most of the treated wastewater discharged to the ocean, and some applied to land.

All river discharge would include a wetland or land passage facility.

We have several final outcomes for these options

Protects public health and minimises public health risks.

Minimises adverse environmental effects on air, land and water.

Is sustainable, enduring, and resilient.

Contributes to improving the health and mauri of the Manawatū River.

Takes an integrated approach to the management of the Manawatū River catchment including understanding cumulative effects.

Enhances people’s use and enjoyment of the Manawatū River.

Is affordable and cost effective.

Minimises whole-of-life carbon emissions and optimises resource recovery.

Is innovative while being evidence based.

Facilitates long term growth and economic development.

Is developed with the active engagement of the community and key stakeholders.