Quarterly water quality monitoring reporting

During the process of CSG extraction, groundwater is released as a by-product, known as CSG water. The quality and quantity of CSG water released through the gas extraction process varies over time and according to the unique geological attributes of a given area.

The CSG water quality is generally low, with limited applications for its direct use. To ensure this resource can be beneficially used, the CSG water is treated to a standard suitable for irrigation, stock watering and augmentation of drinking water supplies.

The Northern WTP produces and the Woleebee to Glebe Weir Pipeline delivers treated CSG water to agricultural customers for beneficial use as part of the Glebe Beneficial Use Scheme. Beneficial use of the treated CSG water occurs along the Woleebee Creek to Glebe Weir pipeline and within the existing Dawson Valley Water Supply Scheme (DVWSS) for irrigation of crops and stock watering.

To ensure the quality of the water provided to SunWater is consistently of a standard that protects the receiving environment, water quality samples are taken weekly and sent to a NATA accredited laboratory for independent analysis and reporting. The suite of analytes monitored in each sampling event is in accordance with the conditions of the BUA.

Northern water treatment facility

The Northern WTP utilises a multiple barrier treatment process including Ultrafiltration (UF), Ion Exchange (IX) and Reverse Osmosis (RO).  These steps ensure that the water can safely and reliably be produced to a quality suitable for discharge into the Glebe Weir.

Approvals

In order to discharge into the Glebe Weir, SunWater have secured a Beneficial Use Approval (ENBU04254412). This approval is managed under the Queensland Department of Environment and Heritage Protection (DEHP).

The Beneficial Use Approval (BUA) is in place to ensure that the water is appropriately reused and carefully managed to minimise any risk of environmental harm. In conjunction with the BUA, SunWater also obtained Commonwealth approval under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC 2011/6181), which provides the Department of the Environment with the required environmental assurances and protections for the receiving environment.

Water quality reports