Red zone boundaries will not be redrawn after blood test results: NSW EPA

A map of the investigation area from the NSW EPA website.
A map of the investigation area from the NSW EPA website.

The boundaries of Williamtown’s contamination red zone will not be redrawn, the state’s environmental watchdog has confirmed. 

That’s despite three of the highest readings coming from beyond its borders, after class action lawyers obtained the results of around 170 residents blood tested for perfluoroalkyl (PFAS) chemicals. 

But a NSW EPA spokesperson said the investigation area would remain unchanged. 

“The Investigation Area was determined through consultation between the EPA, the Expert Panel, Hunter Water and DPI,” she said. 

“The Investigation Area is based on surface water drainage patterns and groundwater flow directions in the region and preliminary surface water and ground water PFAS concentrations.” 

She said people living outside the investigation area with concerns should follow government precautions. 

“Where the NSW EPA has evidence of contamination in the environment outside the investigation area, engagement with property owners has been and will continue to be undertaken by EPA staff to ensure they have all the information they need to prevent ongoing exposure,” the spokesperson said. 


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