According to ABC News (that's the Australian Broadcasting Company, by the way):

The Health Department says another 900 residents could be affected by contaminated bore water in Adelaide's western suburbs.

They live in Findon, further west of the Beverley and Woodville South residents who were warned back in December not to use ground water because it an industrial cleaning agent had been detected.

Hydro geologists have advised that the area affected by trichloroethylene is wider than earlier thought.

Acting chief medical officer Paddy Phillips says letters are being sent to residents of the newly-identified problem area.

"The zone will now extend westward to include Findon Road to the east, Balcombe Avenue to the south, Pioneer Street and Todville Street to the west and Ryan Avenue to the north," he said.

"We're now letting people know that the area has expanded slightly and again reminding people to take appropriate precautions and that is to not use bore water in that area for drinking or swimming or irrigation."

Best we can tell, bore water=private well water.

Surprisingly, there has been no mention of the danger of toxic vapors or vapor intrusion even though contamination has clearly been discovered under and near buildings and homes. These communities should be warned of the risk of vapor intrusion, and tests should be conducted to rule it out.