Water reform is often described as being about the three waters: drinking water, wastewater and stormwater. So when a council moves its water services into a new organisation, people reasonably assume all three go together. In fact, stormwater is frequently treated differently, and that catches many people out. This guide explains who is responsible for stormwater now.
The short answer
In most cases, when a council establishes a water services organisation under Local Water Done Well, that organisation takes on drinking water and wastewater only. Stormwater usually stays with the council. So the body that delivers your tap water and treats your sewage may now be a separate organisation, while your stormwater is still managed by the council itself.
Why stormwater is treated differently
There is a practical reason for this split. Stormwater is closely tied to things the council already manages and is hard to separate from them.
Roads and land use. Stormwater runs off roads, footpaths and developed land. How it is managed is bound up with roading, parks and land use planning, which remain council responsibilities.
Local geography. Stormwater systems are highly local, shaped by the specific catchments, waterways and flood risks of each place. That local knowledge sits with the council.
Overlap with other services. Decisions about drainage, flooding and open space cut across several council functions at once, which makes a clean handover to a separate water organisation difficult.
The exceptions
This is not an absolute rule. Some arrangements do include stormwater. In parts of the Wellington region, for example, the new water organisation is set to manage piped stormwater alongside drinking water and wastewater. Where stormwater is not transferred outright, a council may still contract the water organisation to operate parts of the network on its behalf through a shared service arrangement.
The point is that the treatment of stormwater varies from region to region, so it is worth checking what has been decided in your area rather than assuming.
Why it matters to you
Knowing who is responsible matters most when something goes wrong. If your street floods or a drain blocks, the body to contact may be the council rather than the new water organisation. As reform settles in, it pays to know which organisation handles which service in your area, so you are not left chasing the wrong one when it counts.
