1.3 Billion

Litres of water treated

>6 Billion

Micrograms PFAS removed


Success rate contractual criteria

Client Department of Defence
Location Newcastle | NSW
Value $19m
Timeline Nov 2016 - Mar 2021

Synergy designed and constructed a large-scale multi-barrier water treatment facility to address the overflow from Lake Cochran. This area receives a substantial flow of PFAS-contaminated surface and groundwater before exiting the RAAF Base Williamtown.

Synergy’s bespoke WTP has been operational on the Lake Cochran (LC) project since December 2016 and has successfully treated over 1.3 billion litres of PFAS-impacted water.

The WTP has achieved significant removal of PFAS contaminants to less than 0.01 µg/L, using a 3-stage multi-barrier process. The WTP consists of two systems in parallel to allow uninterrupted operation during maintenance with a flow range of 15 to 70 litres per second. After full treatment 99.83% of PFAS was removed. The WTP has reduced PFAS contamination to achieve NSW EPA, Department of Health and Department of Defence approved criteria for 100% of results. 99% of results were below detection limits (<0.01 µg/L) for Total PFAS (449 samples).