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Quality for water reuse

The quality and quantity of water extracted as part of natural gas production varies depending on the geology of the area. In many areas, the mineral composition of this water is no different from the bore water extracted from some aquifers and used by landholders for irrigation or stock watering.

For example, water from Santos GLNG’s gas fields in Roma typically contains between 1,500 – 5,500 parts per million (ppm) of total dissolved solids. The table below gives you an idea of how this compares to other water sources.


Water sourceWater quality* (parts per million)
Rainwater15-22 ppm
Typical groundwater bore in Fairview and Roma, Queensland700-3,000 ppm
Roma tap water800 ppm (average)
Typical CSG water1,500-5,500 ppm
Livestock and watering4,000-13,000 ppm
Saltwater swimming pool6,000 ppm
Seawater35,000 ppm
Water extracted from coal seams as part of natural gas production can be safely managed and reused.
Santos uses water treatment solutions to ensure quality standards are met for the proposed reuse.