Coolah Wastewater Treatment Plant - Secondary Treatment for Rural New South Wales

Coolah wastewater treatment plant is a secondary-level facility located in Coolah, New South Wales, Australia, within the Warrumbungle Shire Council area. It serves a small population of 1,032 residents, typical of a rural inland community. The plant is operational and discharges approximately 267.14 megaliters of treated wastewater per year. As a secondary treatment plant, Coolah meets the standard requirements for Australian wastewater facilities under the National Water Quality Management Strategy. For small agglomerations like Coolah, secondary treatment is the expected level to protect local water quality. Its operational status confirms ongoing service to the community. The treated effluent from Coolah plant is discharged into the local watershed, which ultimately drains into the Murray-Darling Basin, Australia's largest river system. This basin supports extensive agricultural activity and diverse aquatic ecosystems. The plant's secondary treatment helps reduce nutrient and organic loads, protecting downstream water quality in this ecologically and economically significant region.

Coolah plant discharges into the local catchment that feeds the Talbragar River, a tributary of the Macquarie River within the Murray-Darling Basin. This basin drains to the Southern Ocean via the Murray River mouth in South Australia. The region supports important wetland habitats and migratory bird species, making nutrient and pathogen control critical for ecosystem health.