Hamilton City Council has been sentenced in the Hamilton District Court following a wastewater discharge into the
Waikato River which occurred in February 2018.
In handing down the fine of $54,000, Judge Melinda Dickey noted the Council had entered a guilty plea at the first
reasonable opportunity, had shown considerable remorse, and had identified several corrective actions to prevent similar
discharge events recurring.
As part of its redress actions the Council also agreed to undertake education and awareness programmes, carry out
riparian planting and implement a new internship programme.
On 20 February 2018, the Bridge St wastewater pump station discharged wastewater into the Waikato River. An internal
investigation undertaken by the Council identified two key faults: the wastewater pumps had not been signalled to start,
and high-level alarms were not triggered. Both would normally occur in response to increasing levels of wastewater in
the pump station’s well.
The Council staff who identified the discharge immediately stopped the overflow by restarting the pumps and returning
the pump station to its normal operation. Waikato Regional Council, as the regulator, was notified of the overflow
approximately 40 minutes after the overflow had stopped.
No environmental damage or health concerns were reported by the community in connection to this event, however the
Council appreciates the discharge of wastewater into the Waikato River, te tupuna awa, is particularly offensive from a
Under the 2012 Joint Management Agreement (JMA), the Waikato Raupatu River Trust (Waikato-Tainui) and the Council share
responsibility to protect and restore the health and wellbeing of the Waikato River for future generations.
Following the incident, the Council participated in two positive and productive restorative justice meetings.
Representatives from Waikato-Tainui and Te Haa o Te Whenua o Kirikiriroa (THaWK), representing local mana whenua,
Through this process, the Council committed to several actions to help restore the river and provide guidance for its
future decision-making in respect of the Waikato River.
The actions agreed upon with Waikato-Tainui and Te Haa o Te Whenua o Kirikiriroa include:
• The development of principles for notification and mauri restoration frameworks.
• The Council’s staff undertaking waananga and knowledge sharing in relation to the significance and maatauranga of the
• Remedial actions for Waka Taua present in the Waikato River at the time of the discharge.
• Contribution to riparian planting projects.
• The development and refinement of an internship programme for rangitahi.
• The Council’s staff to share their lessons from the event with industry peers.
Hamilton City Council City Waters Manager Maire Porter says: “We have a strong commitment to protecting the environment
in the work we do, and we are committed to doing our utmost to ensure overflows like this are minimised.”
As part of the investigation undertaken by the Council following the discharge, 16 improvements were identified. These
ranged from the review and update of processes, practice and systems, to additional staff training and improved site
security, and management of change to control systems. All sixteen of these recommendations have since been implemented.
“We have great respect for the Waikato River and consider it a taonga,” says Mrs Porter. “We know the importance the awa
has for local iwi, as well as the wider community. It is vitally important for us as a guardian to keep it safe and
The Council’s Acting General Manager Infrastructure Operations Tania Hermann says: “We know we must work closely and
proactively with our partner organisations, like Waikato-Tainui and Waikato Regional Council. It is imperative to have
open, honest dialogue about the river and its wellbeing – it is the heart of our city.”
Notes to editors:
• Hamilton City Council has been fined $54,000 for a wastewater spill into the Waikato River. Judge Melinda Dickey
started at an initial fine of $80k, however this was reduced by 10% to recognise the completion of a restorative justice
process and a further 25% for an early guilty plea.
• The Judge noted in the sentencing decision the Council had been “fully cooperative” with the investigation and that
its “commitment to the Restorative Justice Process has been commendable.”
• An estimated 1782m3 of wastewater was unintentionally discharged into the Waikato River in late February 2018.
• Wastewater pumps which would have been expected to have operated when the level of wastewater in the pump station
well reached a certain level did not operate.
• Immediately following the overflow, Hamilton City Council undertook a thorough investigation and identified 16
improvements to be made. These include improvements to processes, records and systems, providing additional staff
training, revised audit and quality assurance protocols, and a review of pump station roles and responsibilities. All 16
recommendations have since been completed.
• Following a formal investigation, charges were laid by Waikato Regional Council under Sections 15 (1) (a) and (b) of
the Resource Management Act (RMA).
• Every day the Council collects and treats approximately 50 million litres of wastewater from Hamilton’s residents and
businesses. It is collected and transferred to the Pukete Wastewater Treatment Plant for treatment before discharge to
the Waikato River.
• The Bridge St pump station (located in Anzac Pde) is one of more than 140 pump stations around the city which collect
and transfer wastewater to the Pukete Wastewater Treatment Plant, via a network of more than 800km of pipes.
• As part of the Council’s 2018-28 10-Year Plan, more than $400M of capital projects are planned for the wastewater
network and treatment plant, including work currently underway on a $4.7M upgrade of the Hillsborough pump station on
Grantham St which will see the closure of the Bridge St pump station, and a $30M upgrade of the Pukete Wastewater