Stormwater regulations


​​​Stormwater Bylaw​

​The Hamilton Stormwater Bylaw helps protect Hamilton’s streams and the Waikato River by setting out everyone’s responsibilities in regards to stormwater.  The bylaw provides guidance on what can and can’t enter the stormwater system. 

It gives the Council authority to require actions are taken to ensure the stormwater system and natural environment are protected. 

​​​​Stormw​ater regulations


Most business will be required to have a tradewaste consent.  This is a written agreement or permit to discharge wastewater to the wastewater network ​. You will need to contact Tradewaste Shared Services in order to see if you qualify as a permitted consent holder, before discharge can occur​
  • ​Tradewaste servi​ces - 0800 357 358


​A plan is designed to protect you, your company and the environment. It is written by you and will only work if you and your staff follow it and ensure it is updated regularly.

Frequently Asked Questions

  • What is stormwater?

    Stormwater is rain that runs off our houses, footpaths, roads and carparks. It runs into gutters that flow into the stormwater system. Some of the water we use to wash down surfaces in our homes and businesses also makes its way to the stormwater system.
  • Where does stormwater end up?

    Stormwater collected in the stormwater system is discharged directly into Hamilton's streams and the Waikato River.
  • Why is it important to manage stormwater well?

    Stormwater is discharged, untreated, into Hamilton's streams and the Waikato River so it's important that it is as clean as possible. If contaminated stormwater pollutes the river and streams, this can have a negative effect on aquatic life, the natural environment and public health. It can also limit recreational use of the river.

    Contaminants such as fats and oils can build up in the stormwater system causing blockages that may damage the system and cause flooding.
  • What are our responsibilities in regards to stormwater?

    We all have an important role to play in protecting the stormwater system. The public is responsible for ensuring contaminants, like paint, chemicals and fat and oil don't enter the stormwater system. Landowners are responsible for managing the stormwater runoff from their land to avoid polluting our waterways.

    Hamilton City Council is responsible for managing the discharge of stormwater from our public stormwater systems into the Waikato River. Waikato Regional Council (WRC) is responsible for ensuring our fresh water ecosystems are protected. They do this through setting Regional Plan rules and issuing resource consents that control discharge of contaminants into water (as well as onto or into land and air).
  • What is the Council doing to encourage good stormwater management?

    The Council provides guidance on what can and can't enter the stormwater system and offers practical stormwater solutions though its education plan. The Hamilton Stormwater Bylaw supports the education plan.
  • What is the Hamilton Stormwater Bylaw?

    The Stormwater Bylaw is a regulation set by the Council to help it manage stormwater issues in Hamilton. The bylaw gives the Council authority to require certain actions be taken in regards to stormwater.

    The bylaw:
    • sets out what is and is not allowed to enter the stormwater system
    • provides clarity on everyone's responsibilities in managing the stormwater system
    • provides clear guidance to high-risk facilities on how they should minimise the risk of contaminating the stormwater system.
  • What issues do we need to manage?

    There are a number of stormwater issues to manage. They include:
    • Hazardous substances such as oil and chemicals being discharged into waterways and affecting ecosystems.
    • Wastewater entering the stormwater system through illegal connections which then get into waterways where people swim.
    • Stormwater getting into the wastewater network which overflows into waterways and onto land in heavy rainfall.
    • Uncontrolled sediment entering the stormwater network. This can build up in parts of the network which affects the capacity of the system.
    • Damage to pipes and modifications to established overland flow paths which can increase risk of flooding.
Page reviewed: 30 Jan 2019 3:21pm