NZ InfraWatch
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Rosedale Wastewater Treatment Plant Upgrade
Watercare Services (Auckland Council) · Auckland
Upgrade of the Rosedale wastewater treatment plant on Auckland's North Shore, which Watercare puts at $800m. The solids-stream component adds thermal hydrolysis under a $28m contract with Cambi, with equipment due in 2028 and operations targeted for 2030, letting the plant treat more wastewater on its existing footprint. It sits inside Watercare's $15.2b ten-year programme.
Data current as at 16 Sept 2026, when the pipeline was last checked against its source.
Key facts
- Region
- Auckland
- Sector
- Water
- Status
- Under Construction
- Estimated value
- $800m
- Indicative completion
- 2030
- Funding status
- Fully Funded
- Lead organisation
- Watercare Services (Auckland Council)
- Election risk
- Safe
Election risk assessment
Utility wastewater upgrade funded through Watercare's approved capital programme, not a Crown appropriation.
Government priority alignment
HIGH: Wastewater treatment capacity is part of the stated catch-up on water infrastructure; charge funded rather than Crown dependent.
Recent changes
- 2026-W37Major New project added: Rosedale Wastewater Treatment Plant Upgrade (Under Construction, $800m).
Chronology
- 2026Contract signed with Cambi for two thermal hydrolysis systems, at $28m
- 2028expectedThermal hydrolysis equipment due to be delivered
- 2030expectedOperations targeted
Source
Thermal hydrolysis on the way for Watercare's Rosedale Wastewater Treatment Plant (Scoop, Apr 2026) ↗ · Watercare's $15.2b plan (NZ Herald, Jul 2026), which puts the Rosedale upgrade at $600m ↗ · Watercare: thermal hydrolysis on the way for Rosedale ↗