Property hazard reports and map

GIS Maps is an online tool that displays publicly available information about properties in a map format.

Open GIS Maps

Enter an address to find out more about a property including:

  • boundaries
  • rates information
  • property size
  • capital and land values
  • water and waste water lines
  • stormwater flows (shows potential path and ponding of water during heavy rain)
  • road names
  • hazards such as coastal erosion, mining, stability to acid, sulphate soils

The menu on the side of the map can be used to show more layers of information relating to the property (but not the property owner's name or details).

Aerial views of properties are also available.

Types of hazards shown

Acid sulphate soil

Acid sulphate soils are naturally occurring, having been deposited when the sea level was around 5 metres higher than it is at present, 5 to 10 thousand years ago. While the land was under the sea, salts in the seawater mixed with this land. Now that the sea level has dropped this land which was under the sea and mixed with salty sea water is now available for use. 

Areas that are known to have acid sulphate soil are shown on our GIS maps. You can read more about this phenomenon on the following page:

Acid sulphate soil planning policy page


Coastal hazards

Erosion, landslips and sea water flooding are the dominant natural coastal hazards along the District's coastline.

Coastal erosion is either a long-term trend or a significant short-term shoreline fluctuation, especially on sand dune-backed coasts. Landslip is directly associated with coastal erosion where the geology is relatively weak and prone to slope failure.

Severe coastal storms or tsunami produce waves which can temporarily flood low-lying coastal areas. The effects of climate change are likely to increase hazards in the coastal zone.

Coastal hazards reports

Coastal Management Strategy

Review of Coastal Hazard Zones for Eleven Selected Beaches(PDF, 2MB)

Coastal Hazard Risk Zone Assessment for Pataua and Matapouri Bay(PDF, 4MB)

Coastal Erosion Hazards Review - One Tree Point to Waipu Cove(PDF, 597KB)

Projected Sea Level Rise - Ruakaka and Marsden Point(PDF, 2MB)

Coastal Hazard Zone Assessment for One Tree Point and Marsden(PDF, 1MB)

Coastal flooding and coastal erosion

The Northland Regional Council manage the coastal hazard maps for coastal flooding and coastal erosion.  You can view information about coastal hazards on their website.

Coastal hazards (nrc.govt.nz)

In April 2021, the Northland Regional Council released a bew update to the coastal flooding and coastal erosion maps.  

There is a three-month feedback period before the maps are finalised in mid-July, and people should get in touch with the Northland Regional Council directly to discuss any technical aspects of the maps. 

Update to coastal hazard maps (nrc.govt.nz)

Contaminants in soil

Potential contaminants site search

If you require a site search for potential contaminants please complete and submit the following form to council.

Site search for potential contaminants application(PDF, 155KB)

Ensuring land is safe for human use

The National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health (NESCS) came into effect in January 2012. 

They provide a nationally consistent set of planning controls and soil contaminant values to ensure that land affected by contaminants in soil is appropriately identified and assessed before it is developed.

If necessary work is done to eliminate the contaminants, or the contaminants are contained, to make the land safe for human use.

All territorial authorities (district and city councils) are required to give effect to, and enforce the requirements, of the NES.  

About the National Environment Standard (Ministry for the Environment)

Contaminants in soil regulation (New Zealand Legislation)

Flooding

Tropical storms and high rainfall intensities  expose many areas to flooding. There are obvious floodway areas plus areas that are susceptible to ponding. 

A Flood Susceptibility Report was undertaken in response to submissions on the District Plan and the District Plan maps show all the flood susceptible areas as they were documented in 2001. 

Our GIS maps are used where specific property information is requested and in assessing building consents.

Flood reports

Flood Susceptibility Mapping Report 2001(PDF, 1MB)

Waipu Cove Flood Management (2015)(PDF, 2MB)

Land instability

Geological characteristics and soil types in the district mean that some areas are unsuitable for development. Inappropriate earthwork activities and / or the removal of vegetative cover also contribute to land instability. 

Coastal instability

Coastal hazards pose a significant threat to a high number of communities in the district. Between 2001 and 2005, a series of land instability assessment reports were commissioned for coastal areas that were under development pressure within the Whangarei district.

Urban instability

A further series of reports was commissioned in 2006 to assess slope instability for five large areas on the outskirts of Whangarei City.

Land stability reports

Urban Land Stability Hazards for Kamo, Maunu, Onerahi, Otaika and Tikipunga(PDF, 386KB)

Urban Land Stability Hazards for Hikurangi, mid-Kensington, Whangarei City Centre and East Kamo(PDF, 836KB)

Urban Land Stability Hazards for Kensington, Morningside and Port(PDF, 203KB)

Coastal Slope Instability Hazards for Oakura to Langs Beach(PDF, 549KB)

Mining zones

Coal mining

Coal mining was formerly a major industry in Northland and major coalfields were located at Kamo and Hikurangi, both of which are now urbanised. Hazards such as subsidence, sink hole formation and unstable fill restrict development in these areas.

Engineering assessment reports of the subsidence hazard resulting from mining in Hikurangi and Kamo give us the basis for the preparation of an updated and revised policy on development within these two areas.

Mine zone reports

Mine Subsidence Hazard - Hikurangi Area(PDF, 242KB)

Mine Subsidence Hazard - Kamo Area (2013)(PDF, 2MB)

Mine Subsidence Hazard - Kamo Area (2005)(PDF, 307KB)

Kamo Mine Zones Map (March 2005)(PDF, 1MB)

Hazards and Risks - District Plan

Part 2: District Wide Matters of our District Plan includes policies and rules about Hazards and Risks, including:

  • Contaminated sites
  • Natural hazards
  • Hazardous substances

District Plan - Part 2: District Wide Matters