Water bills across Wellington’s four cities will rise sharply over the next decade as Tiaki Wai begins fixing ageing infrastructure. Charges will increase by an average of 14.7 percent this year, adding about $310 to household bills. Further rises of 28 percent are possible in 2027–28, with average annual bills projected to reach about $6831 by 2036.

Households will receive separate water bills from 1 July, replacing charges previously included in council rates. In the first year, Porirua residents will pay an average of $368 more, Lower Hutt $349, Upper Hutt $278 and Wellington $275.

Tiaki Wai chairman Will Peet said the increases were necessary after decades of underinvestment. The organisation will inherit $9b in water assets and $1.7b in debt, but current revenue of about $385m per year is not enough to meet long‑term costs. Many assets are in poor condition, with three of four wastewater treatment plants non‑compliant and networks contributing to overflows, flooding and pollution.

One priority is repairing the Moa Point Treatment Plant, which has been discharging raw sewage since a major failure in February. Peet would not comment on repair costs or timelines.

Tiaki Wai has been set strict compliance targets by councils and mana whenua, but Peet said these would not be met in the first year due to existing issues. He said no one would have their water turned off for non‑payment, and the organisation has a hardship policy, though debt collection is not being considered at this stage.

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

25/03/26