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Acid Sulfate Soils

Acid sulfate soils are the common name given to soils containing iron sulfides.

The iron sulfides are contained in a layer of waterlogged soil.

The water prevents oxygen in the air reacting with the iron sulfides. This layer is commonly known as potential acid sulfate soil (PASS) because it has the potential to oxidise to sulfuric acid.

When the iron sulfides are exposed to air and produce sulfuric acid, they are known as actual acid sulfate soils.

Sulfuric acid can pass into waterways and groundwater and effect plant growth, aquatic life, the release of heavy metals, animal and human health, and may corrode and damage engineering structures.

An Acid Sulfate Soils Planning Map has been produced by Council's GIS staff based on information from the Department of Infrastructure, Planning and Natural Resources (DIPNR).

Clause 51A of the Port Stephens Local Environmental Plan 2000 requires development consent for specific works within five (5) land classes. Refer to the Acid Sulfate Soils Policy in conjunction with the attached Map.

Please note the size of the "Acid Sulfate Soils Map" before downloading.  This may take some time for those users with dial up.

Contact details
Land Use Planning Section
02 4980 0247 (ph)
02 4987 3612 (fax)
council@portstephens.nsw.gov.au

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