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Operating in 15 council regions across Aotearoa, our Water Operations & Maintenance team helps keep three waters running reliably for a quarter of New Zealand’s population

Supporting reticulation, treatment and network resilience, our team works alongside asset managers to maintain critical infrastructure with speed, safety and precision.

Services include:

  • Water, wastewater, stormwater reticulation maintenance
  • Mechanical and electrical maintenance of pump stations
  • Treatment plant operations, maintenance and servicing
  • Leak detection, closed circuit television (CCTV), hydro jetting, sump cleaning, and acoustic wastewater assessment (SLRat)
  • Stormwater network maintenance including tree and channel clearing, inspection work, critical outfall inspection work, stormwater treatment device maintenance
  • Reservoir cleaning, mains chlorination and commissioning
  • Minor construction: mains renewals, deep excavation, pump replacements, pump station cabinet rebuilds, meter replacement programs, watermain and fire connections
  • Emergency response services – helping to keep the network running in times of an adverse weather event

Downer invests in innovative systems to support modern infrastructure asset managers. We provide customers with detailed insights into service requests, reactive works, planned maintenance, and asset data — enabling long- term planning and preventative maintenance.

Emergency Response Services

Our Water Services & Projects team is available 24/7 to keep essential three waters services running for local communities during extreme weather events.

With a deep understanding and sense of ownership over our local networks, our frontline team members respond to widespread water outages and damaged infrastructure caused by these events, helping communities to manage and recover from the disruption to their everyday lives.

We operate with deep network knowledge and real-time data, allowing for pre-emptive actions like checking pumps, managing reservoir levels, and isolating high-risk assets. Field crews are strategically rotated and supported to prevent fatigue, while strong communication channels with local councils ensure coordinated, effective responses.

Services include:

  • Coordinating emergency planning with stakeholders to strengthen network weak points
  • Managing communications to support operations and field team safety
  • Conducting asset checks before and after events to assess risks
  • Maintaining wastewater operations
  • Preventing stormwater overflows
  • Safeguarding drinking water with temporary supply solutions
  • Repairing and recovering damaged water infrastructure
  • Downer’s emergency response isn’t just reactive – it’s resilient, people-focused, and built on trust, experience, and operational excellence.

In-house engineering

We deliver technical support to network and treatment plant teams through:

  • Network issue resolution using tools like Sewer Line Rapid Assessment Tool (SL-RAT), CCTV, and Pole Cam
  • Maintenance planning with reliability-centred principles
  • Plant performance optimisation
  • Preparing O&M manuals, water safety plans, and audit documentation
  • Condition assessments for asset viability and compliance
  • Supporting minor capital works and pipe renewals
  • Operational Technology & Business Systems

14 million people
serviced by Downer Water across Australia and New Zealand
80+ treatment plants
designed and constructed throughout Australia and New Zealand.
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