Water supply residue causes some concern

By: Craig Powell

Warkworth water consumers are noticing an unhappy side-effect of their new water supply.

Last December, Watercare switched over from a river supply to an underground aquifer. Around three million litres of water is being drawn each day from two bores, reaching 180-220 metres below ground.

The water is described as moderately hard, which is leading to a build up of limescale on some domestic appliances such as dishwashers, kettles and washing machines.

A Watercare spokesperson says groundwater absorbs naturally occurring minerals from surrounding rocks such as sodium, calcium, magnesium, potassium, chloride and bicarbonate.

She says the new treatment plant produces A-grade water and the process at the plant is designed to reduce iron and manganese content to well below New Zealand’s Drinking Water Standards. ... read more


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