Residents advised to avoid the the Porirua Stream from Grenada Village including Tawa to the outlet at the mouth of the Porirua Harbour until further notice
Residents advised to avoid the the Porirua Stream from Grenada Village including Tawa to the outlet at the mouth of the Porirua Harbour until further notice

Wellington Water crews stopped a wastewater overflow in Grenada Village which flows to the Porirua Stream. Residents are asked to avoid the the Porirua Stream from Grenada Village including Tawa to the outlet at the mouth of the Porirua Harbour until further notice.

As untreated wastewater entered the stream, these areas are unsuitable for the public for wading in, fishing, or gathering food from. Signs have been put up and sampling will be undertaken tomorrow morning.
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Your Water / The Network / Wastewater / Wastewater Treatment Plants / Featherston Wastewater Treatment Plant

Featherston Wastewater Treatment Plant

At the Featherston Wastewater Treatment plant, sewage flows through a facultative pond, a maturation pond, and ultraviolet treatment. Discharge of the treated effluent is managed to Donald’s Creek depending on the conditions of the Resource Consents.

The plant was granted new consents on 25 August 2009 with a variation granted on 12 November 2010. These consents expired on 25 August 2012. The plant is currently operating under this expired consent. An application for new consents is on-going.

In general, the consent allows SWDC:

  • to discharge treated wastewater to Donald’s creek at up to 9,000 cubic meters per day in dry weather and up to 12,000 cubic meters per day in wet weather.
  • to discharge odours and other contaminants from the treatment process within the boundary.

Resource consents

WAR970080 Featherston WWTP Consent Conditions

Plant performance


Current Status: Compliant

Period: November 2025

 


Commentary:

the Resource Consent was granted by Greater Wellington Regional Council on the 8 October. 

The upgrade project will be managed by SWDC, with operations still being undertaken by Wellington Water until the transition date.

Items of significance:

With effect 01 July 2025, SWDC took back ownership of the Capital Delivery Programme and associated projects .

Read the November 2025 Featherston wastewater treatment plant performance monthly report