Salinity locations and mapping

Find out where salinity occurs and view maps and reports via our Data portal.

Salinity occurs in many parts of New South Wales. Examples include:

  • dryland salinity, which is widespread on the western slopes and in the Hunter Valley and Sydney Basin
  • irrigation and river salinity, which are seen in the southern irrigation areas of NSW and in the Macquarie, Castlereagh, Bogan, Namoi and Gwydir Rivers
  • urban salinity, which affects more than 40 towns across the Murray Darling Basin in NSW, and in the lower Hunter valley and Western Sydney.

Hydrogeological landscapes

A hydrogeological landscape (HGL) describes the soil, rocks, climate and landforms that influence salinity in a given area, and provides salinity management options for specific parts of the landscape. To help identify areas where salinity hazards exist, HGL mapping is taking place progressively across New South Wales.

You can download HGL reports and mapping products for selected areas of New South Wales from the OEH Data portal. These areas include:

General management actions for salinity have been developed to compliment the HGL mapping. These are outlined in: Guidelines for Managing Salinity in Rural Areas (PDF 3.1MB)

Line work for mapped HGL areas and associated thematic maps are available on the OEH soil data viewer (eSPADE).