Nelson North WWTP

Nelmac has been responsible for the management and maintenance of the Nelson North Wastewater Treatment Plant (NNWWTP) since 2008.

Servicing a residential population of approximately 55,000 people, the NNWWTP plays a crucial part in the health and sustainability of the Nelson City area.


  • Primary screening
  • Primary clarifier
  • Biological Tricking Filter (BTF)
  • 1 x 26ha baffled oxidation ponds
  • 2 x 7ha planted wetlands
  • Sea outfall


Routine, proactive and reactive maintenance of the Nelson Wastewater Treatment Plant.

  • Operation and routine maintenance of pre-treatment works oxidation ponds and wetlands
  • Testing and monitoring of resource consent compliance
  • Reactive maintenance and emergency work
  • Minor repairs/projects
  • Routine monitoring and testing
  • 24/7 service support
  • Duty operator roster system


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

Allan Jones | 021 845 810