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Greater Western Water owns 114 hectares of land classified as significant for its biodiversity across the area previously serviced by Western Water.

By working closely with Landcare and other community groups, as well as catchment manager, Melbourne Water, the land’s biodiversity is protected and enhanced at the local level, ensuring the land we own will provide habitat for local plants and animals into the future.

Our key activities include weeding and pest control, planting and protecting native grasses, shrubs and trees, and building habitat for native birds and animal species.

Much of these activities are undertaken in partnership with local environment groups such as Pinkerton Landcare Environment Group and Deep Creek Landcare.

Werribee River and Pinkerton Forest, Melton Recycled Water Plant

Greater Western Water owns a 692ha property at Mount Cottrell where it operates the Melton Recycled Water Plant. The land includes significant areas of remnant vegetation at Pinkerton Forest and along the Werribee River and the surrounding volcanic gorge.

Work with the Pinkerton Landcare and Environment Group (PLEG) for more than a decade has yielded fantastic results:

  • preservation of critically endangered, high quality Plains Grassy Woodland in Pinketon Forest and large old growth River Red Gums along Werribee River
  • emergence of rare indigenous tree species such as the Blue Box Eucalyptus Magnifica
  • return of large birds such as White-Bellied Sea Eagle to breed , widely recognised as a major conservation achievement, and more recently,
  • the return of Magpie Geese to the local area.

At the 35ha Pinkerton Forest, significant bird species are regularly observed include the Diamond Fire-Tail, Brown Tree-Creeper and Jacky Winter.

The Pinkerton Forest site is used as an environmental conservation education resource for secondary and tertiary students as well as environment groups.

Through working with PLEG, a major habitat corridor has been created between Pinkerton Forest and Bush’s Paddock linking the eucalyptus woodlands and allowing native animals to access both sites, increasing food supply and promoting healthier, larger populations.

Deep Creek, Romsey Recycled Water Plant

Significant biodiversity assets along Deep Creek include remnant grassland sites listed as critically endangered.

We have worked with Deep Creek Landcare and students from Salesian College each year to celebrate World Environment Day by joining together in a major planting activity along Deep Creek to further revegetate the streambank with indigenous plants, forming an important habitat corridor for native animals.

Jacksons Creek, Sunbury

At Sunbury, we are 4.7 hectares of Streambank Shrubland and Grassy Plains Woodland of very high conservation significance.

Of note also is the healthy family of platypus living in Jacksons Creek downstream of the treatment plant.


  • Campaspe Reservoir - 1 hectare of scattered native grasses and trees supporting a wide variety of wetland birds
  • Mount Macedon Reservoirs – 8 hectares of undisturbed Herb-Rich Foothill Forest surrounding the water treatment plant
  • Woodend Recycled Water Plant – Large old growth Manna Gums Swamp Gums and Narrow-leaved Peppermints as well as the endangered Black Gum.