Water meter roll-out confirmed

Thursday, 18 June 2026

Regional water company IAWAI has confirmed a four-year roll-out of water meters in Hamilton.

IAWAI is the new council-owned company responsible for water and wastewater services in the Hamilton City and Waikato District Council areas.

It was established last year to jointly deliver efficiencies for the communities it serves and to align with government policy and direction.

On Thursday, the company’s independent board approved the citywide rollout of water meters, to charge users for the amount of water they use.

The move will mean renters will pay for all the water they use, in the same way they pay for the power they use - not the landlord.

A recent trial across 200 properties highlighted the potential water conservation benefits of metering.

The meter data identified leaks on private property across 19% of the participating homes.

Almost one in five properties had previously-unknown water leaks on their property – together allowing around 5 million litres of treated water to be wasted.

The trial findings say water meters are expected to reduce peak demand consumption by around 20-25%.

Waikato District properties already have metered water for residential and commercial properties.

Hamilton has about 4000 meters in commercial properties but none in homes.

IAWAI chief executive Peter Winder says metering is the single biggest contributor to finding efficiencies in the future costs of water services.

“It boils down to this; the costs for households if we don’t start metering would be far greater than the costs to introduce them,” Peter Winder said.

“There’s a raft of benefits from metering, whether it be environmentally, culturally, financially, or simply because without significant conservation we will exceed the limits of our consents. We use around 50% more water per person than households in Tauranga – at this rate we will hit the limits of our consent to take water within the next 10 years.”

A large-scale trial is planned for 2027 with a multi-year rollout of meters in a project budgeted with a 15-year “whole of life” cost of around $155 million. The budget includes building the initial network and management systems to support metering, purchase and installation costs of the meters, as well as ongoing operation, billing and maintenance costs across 15 years.

New Zealand Taxpayers' Union head of policy and legislative affairs James Ross says water metering is a smart tool that provides “dynamic feedback’’, overcoming the inefficiencies of water bureaucracies.

However, he cautions against them being used “to wring more cash out of residents’’, without cutting costs elsewhere.

“We’re seeing across the country that despite councils removing water from their books, rates bills aren’t falling by anywhere near as much as they should.”

“Cost increases much larger than the rates hikes councils consulted on are being lined up for this year.

“Water bills might get the blame, but the reality is councils are taking the chance to pull a fast one on ratepayers.'