A comprehensive research study into the environmental health of Lake Macquarie near Vales Point Power Station has delivered encouraging results, with the lake found to be in relatively good condition.
The three-year study, led by NSW Environment Protection Agency, collected water and sediment samples from multiple locations in the lake’s southern area to understand the potential impacts of Vales Point and Eraring power stations and coal ash repositories on the lake’s marine life and ecological health.
These samples were independently tested and analysed by NSW Department of Climate Change, Energy, Environment and Water (DCCEEW) scientists for 20 metals including lead and cadmium, as well as nutrients in the water.
The testing and analysis found low levels of contaminants in both water and sediment, and no evidence of significant environmental impact from the power stations and their coal ash repositories.
Importantly, the data shows Lake Macquarie is in relatively good condition. Despite decades of industrial and urban activity, the Lake’s health has improved over time with metal concentrations declining since sampling was conducted in 2011 – a trend that is expected to continue.
The research forms part of NSW Government’s response to the Inquiry into the costs for remediation of sites containing coal ash repositories and contributes valuable insights into how coal ash may be affecting the lake environment.
An independent expert panel, including representatives from CSIRO and Australian National University, reviewed the research findings.
Learn more about the Lake Macquarie environmental health monitoring study and findings.
Published 7 July 2025