- Loss of habitat for native species: The construction of dams and reservoirs has flooded large areas of land, displacing native species from their habitats and causing a decline in biodiversity.
- Change in water quality: The dams have also changed the flow and temperature of the rivers, which has had a negative impact on water quality and aquatic ecosystems.
- Salinisation: The irrigation water from the Snowy Mountains Scheme has caused salinisation of soils in some areas, making them less productive for agriculture.
- Erosion: The removal of vegetation for the construction of dams and reservoirs has also led to increased erosion, which can cause damage to infrastructure and waterways.
- Impact on cultural heritage: The construction of the Snowy Mountains Scheme has also had an impact on Aboriginal cultural heritage, as it has disturbed or destroyed a number of significant sites.