Another report has been added to a growing stack, criticising the Three Waters reforms.

New modelling commissioned by the group Communities 4 Local Democracy suggests stripping councils of control of their assets isn't worth it.

It's found councils could fund their water infrastructure for the next 20 years without needing to merge, impose new water charges, or change their debt caps.

The group's chair Helen Worboys told Mike Hosking the Government's approach doesn't make sense.

She says reforms don't need a gold-plated model, and keeping Three Waters assets contained within councils is a viable option.

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