Operations and maintenance

Nelmac operates and maintains every aspect of three waters infrastructure and service provision.

In doing so we optimise community water and public health outcomes, and provide value for money helping local authorities meet their three waters obligations.

With over two decades of experience running water and wastewater treatment plants and full three water networks, our operations team has extensive three waters knowledge. We inspect and survey water assets and implement programmes to manage demand and optimise asset performance.

SCADA expertise

Having designed and deployed superior SCADA systems, we monitor and control flow, monitor and respond to alarm information, and control all data at central base station for water networks. Using SCADA we routinely assess and make improvements to asset operating control systems to improve operations, reduce risk and deliver a better level of service.

Smart solutions

Our electrical team provides a wide range of services including installing new pump stations and treatment plant systems, troubleshooting problems and repair or replacement of various components or systems.

A fully integrated approach

Our project planning expertise includes project definition and scope; procurement; works and scope management; onsite supervision; change and relocation management; and project release.


  • Asset inspections
  • Survey services
  • Demand management
  • Pipeline condition surveying
  • Water leakage reduction
  • Backflow prevention
  • Water inflow
  • Wastewater inflow and infiltration reduction
  • Pressure management
  • Water metering and back flow prevention
  • Flow measurement
  • Pipeline survey, inspection and profiling
  • Water quality improvement programmes
  • Mechanical and electrical condition assessment
  • Project-lead/management
  • Contractor liaison
  • Stakeholder management and communication


Tel. 0800 635 622 - press '1' for Water

Duncan Renwick

DRenwick@nelmac.co.nz  |  027 545 1900

Allan Jones

AJones@nelmac.co.nz  |  021 845 810