Every year, millions of litres of stormwater is discharged into the city’s streams, harbour and coastal waters. 

Two men in hardhats and safety vests

That stormwater can contain contaminants, such as oils, paints, detergents, litter, animal droppings, and – after heavy rainfall – sewage. The environmental impacts of stormwater runoff are monitored, and generally comply with resource consents and environmental standards.

In the next three years, we will be introducing real-time monitoring of the stormwater network. This will enable us to measure flows of stormwater and pollutants into waterways, and allow us to better manage pollutants when stormwater is causing environmental harm.


  • Better understanding of the network's performance.
  • Better understanding of environmental impacts from stormwater, and greater ability to control those impacts.

What you think

47% Feedback received that supports our overall plan

17 Number of times people have told us what they think about this idea

94% Feedback received that supports this idea

#27 Out of 28 ideas based on amount of feedback received.

Who would benefit most?

30% Local residents
25% Future generations
18% Local businesses
18% Visitors to Wellington
9% NZ as a whole
  • Local residents
  • Local businesses
  • Visitors to Wellington
  • NZ as a whole
  • Future generations
  • Other

How should we prioritise it?

41% Quite high
41% High
18% Neutral
  • Quite low
  • Low
  • Neutral
  • Quite high
  • High
  • Carroll, Wadestown

    This is a core council service and needs to be addressed regionally to ensure agreed quality and standards are met and economy of operation achieved.

  • Jos , Kelburn

    It seems a useful capability, but monitoring alone will not mitigate the effects of pollution. Augmenting this monitoring with investments in distributed residential rain-water collection will help extend the life of the network and improve community resiliency.