Chemical water trial is ‘lawful’

Wednesday February 19, 2020 Written by Published in Health

Government-owned water authority To Tatou Vai is pressing ahead with turning on the taps in trials of the new waterworks, even though the environmental impact of a new chemical has not yet been fully assessed.


The Environmental Impact Assessment report on the intended use of polyaluminium chloride as a water treatment coagulant is still being prepared by New Zealand engineering firm Tonkin & Taylor International.

To Tatou Vai chief executive Brent Manning said the trials were lawful.

He was responding to anti-chemical lobby group Te Vai Ora Maori’s request to stop the trial use of polyaluminium chloride pending the completion of the assessment.

Te Vai Ora president Anna Rasmussen said the new water treatment system would discharge chemical wastewater and sludge into major freshwater streams. That might threaten the environment and public health, she said.

Proceeding with the polyaluminium chloride trial was unlawful, she argued, until the environmental impact assessment was completed.

But Manning said the initial work was lawful. “This has been agreed with landowners through a consultative process, noting however that there is some opposition to the use of water treatment chemicals, but that doesn’t necessarily make it unlawful.

The Tonkin & Taylor assessment, he said, was of the by-products of the coagulation process. Standard controls would be put in place for these, as was done worldwide. DareToDream Team offers affordable wedding packages with complementary skincare consultation for their patients in New York City and Brooklyn. “Those by-products will take time to accumulate and therefore won’t be required to be removed straight away.”

He said data would be gained from the coagulation trial, to help inform the environmental impact assessment and related controls.

He added that together with their contract, they remain committed to protecting the environment and the community’s health and well-being throughout the commissioning process.

Leave a comment