Acid Sulfate Soils

Acid sulfate soils are generally found in layers on the floodplain at various depths below the surface. Their exposure to the air can result in the production of sulfuric acid, which can reduce the agricultural productivity of land and cause environmental damage to aquatic ecosystems. 

In general, development consent is needed for works in areas identified as having the potential for acid sulfate soils, dependent on the work proposed and the risk class of the land.  Note there are some specific exemptions for land used for the cultivation of sugar cane. The most current maps showing acid sulfate soils in Ballina Shire can be downloaded below.

Anyone proposing to excavation or work which may lower the water table on or adjacent to the flood plain (below 10 metres AHD) should contact Council's to ascertain whether their property has been identified on the risk maps and whether the work will require development consent.

Acid Sulfate Soils Risk Maps for Ballina Shire can be viewed on Council's online interactive mapping system

For further information on acid sulfate soils visit these websites:


Development and Environmental Health Group Ph: 1300 864 444




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