Water contamination may be linked to coal seam gas wells

RESULTS have confirmed the presence of methane gas in the Wallumbilla water supply, following extensive CSG testing by ALS Environmental.

In a statement released by Maranoa Regional Council yesterday, Mayor Robert Loughnan said until the source of the gas could be determined and corrective action taken, Bore 2 would remain offline, with Wallumbilla's water being sourced exclusively from Bore 1.

"There continues to be no impact to Wallumbilla residents' water supply - we are ensuring that consistent quality water will continue to be available while Bore 2 is offline," Cr Loughnan said.

The statement said council had no knowledge of gas being present in water before this instance.

The detection came approximately three weeks ago, when an air relief valve on Bore 2 was automatically activated.

Following this discovery council officers shut down and bypassed Bore 2 with Bore 1's supply.

Bore 2 sources water from the Gubberamunda aquifer, while Bore 1 was sourced from the Mooga aquifer.

Council said were are a number of potential causes for gas to be in the water supply, and investigations are underway to determine its presence and whether it is linked with activity in the Gubberamunda aquifer.

Until the cause can be determined Bore 2 will remain offline and Wallumbilla's water will be sourced exclusively from Bore 1.

The Department of Natural Resources and Mine - CSG Compliance Division is assisting with investigations.


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