Flood maps

What is a flood map?

A flood map identifies land that is at risk of flooding from rivers.

The regional council is producing flood maps for the 26 Northland catchments identified as having the highest level of potential flood risk, as part of the Priority Rivers Project.

The maps are designed to raise awareness of where flood hazard areas are and inform decision-making, to help minimise the impacts of flooding in our region.


The maps have been compiled using an assessment of best available information, and should give a good indication of the areas at risk of flooding.

However, flood mapping is a complex process which involves some approximation of the natural features and processes associated with flooding. Before using the flood maps, please ensure that you understand the disclaimer.

Download the Disclaimer (PDF, 240 KB)

What’s on the maps?

The flood maps show the likely extent of river flooding during a 10-year or 100-year flood event. A 10-year flood area has a 10% chance of flooding annually, whilst the more extensive 100-year flood area has a 1% chance of flooding annually.

To find out more about the flood maps and how they are used, see our Frequently Asked Questions.

Download the Frequently Asked Questions (PDF, 456 KB)

Where can I view the maps?

The maps are available for viewing on our GIS website.

View the flood maps on our GIS website

Need help navigating the maps?

Download our Quick Start Guide to help you navigate the maps (PDF, 1.4MB)

What if I disagree with the maps?

If you believe that a particular location on a map is not at risk of flooding, or you have information that you think may not have been taken into account, get in touch with the regional council's rivers team on 0800 002 004.

Flood maps and the Building Act

Under the Building Act, district councils will take into account the flood maps when making decisions on building consents.  For queries on this please contact your district council:

  • Far North District Council – 0800 920 029 or 09 401 5200
  • Kaipara District Council – 0800 727 059 or 09 439 3123
  • Whangarei District Council – 0800 932 463 or 09 430 4200