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George River Catchment - 2005

​​​​​General Findings

Rigorous scientific analysis of water samples collected in February 2005 from the George River Catchment at St Helens has found no man-made chemical of any sort. The water samples were collected at the same time and same locations as those collected by Dr Marcus Scammell.

Toxicity testing carried out by the Analytical Services Tasmania (AST) laboratory revealed only naturally occuring compounds you would expect to find in any Tasmanian river. These organic compounds were found to be terpenes, fatty acids and aromatic ring compounds. These compounds are produced by native forest vegetation, ​particularly ti-tree and eucalypt species.

These organic compounds sometimes build up near river eddies or on quiet stretches and can appear as a surface foam.​

Toxi​​​city Findings

No water samples (Surface or Bottom) from any location proved toxic to the tiny freshwater crustacean Daphnia (which is highly sensitive to a broad range of pollutants).

Only concentrated surface foam proved toxic to Daphnia.​

Laboratory Results

The results of the chemical and toxicity analyses as reported by Analytical Services Tasmania (AST) Laboratory are provided below:

  Analytical Results of George River (2005)   (57Kb)

  Analytical results of Crystal Creek and Groom Rivers (2005)   (46Kb)

 ​Toxicological Analysis of George, Groom Rivers and Crystal Creek (2005)   (108Kb)




Water Section
134 Macquarie Street
Hobart TAS 7000
Phone: 03 6165 4599 Fax: 03 6173 0254
Email: water@epa.tas.gov.au