Wellington residents face steep water bill increases under new water entity Tiaki Wai. Charges will rise nearly 15 percent this year, from $2100 to $2400. Bills could reach about $6800 a year by 2036 as the organisation works to fix ageing infrastructure.

Local government minister Simon Watts said the projected costs were higher than expected. He said Tiaki Wai’s plan submitted to DIA last year did not forecast increases of this scale. Watts phoned Wellington Mayor Andrew Little seeking an explanation.

Tiaki Wai said last year’s plan was based on the best information available at the time and costs will continue to be reviewed. Little said he shared concerns about affordability but noted the government introduced the current model. He said he would scrutinise Tiaki Wai’s performance and pricing.

Little wants the Commerce Commission to have powers to intervene if bills become unreasonable. Watts did not confirm this but said the commission had been asked to work with Tiaki Wai and councils on the projected prices.

Porirua Mayor Anita Baker said bills nearing $7000 a year were unaffordable and could drive residents away. She supported the water entity but said charges must remain manageable.

Residents were divided. Some were worried about cost‑of‑living pressures. Others said decades of under‑investment meant higher charges were unavoidable. Some supported water meters to encourage reduced use.

Tiaki Wai is considering water meters, which could take seven years to roll out and cost $590m. The organisation said the region’s infrastructure is in poor condition, with leaks, wastewater compliance issues and stormwater challenges. Fixing the failed Moa Point plant remains a priority.

Source: Ellen O’Dwyer / Radio New Zealand (RNZ)

26/03/26