National is promising to repeal the Government's three waters reforms and return water assets to councils if it wins the next election.
Local Government Minister Nanaia Mahuta is currently weighing up feedback from councils on her three waters proposals, which would see each council give its water assets like pipes and reservoirs into one of four massive new water entities.
These four water entities will manage all water services in New Zealand, including freshwater, stormwater, and wastewater, collectively known as "three waters".
Councils will collectively own the new water entity their assets are rolled into, but they will have almost no control over it.
This has stirred no small amount of controversy in councils, and led to a breakdown in the relationship between some councils and the Government.