Port unveils stormwater treatment system

Port chief executive Leonard Sampson described the project as the company’s largest infrastructure initiative to date focused on improving water quality. “While the port continues to comply with its resource consent conditions, we pride ourselves on doing more than simply what is required. Our new stormwater treatment system is an example of this approach,” he said.

The system is designed to capture and treat contaminated runoff, particularly during the ‘first flush’ of rainfall, when pollution levels are highest. It includes a custom-built above-ground tank capable of holding up to one million litres of water, which can then be treated over a 24-hour period before being discharged into Tauranga Harbour.

Environmental manager Joey McKenzie said the system was developed following extensive monitoring and sampling. “Through sampling we could identify the ‘first flush’, which is the dirtiest part of stormwater at the start of a rain event,” he said.

The port has also introduced additional measures in recent years, including vacuum sweepers, filtration systems and physical barriers to prevent debris entering the water.

Regional council chair, Matemoana McDonald welcomed the investment, saying it would contribute to improved environmental outcomes. “Water quality is vitally important, and the regional council is grateful for the port’s work to continuously improve the health of the harbour,” she said.