Capricornia Correctional Centre Wastewater Treatment Plant, Etna Creek, Queensland

Capricornia Correctional Centre wastewater treatment plant is located in Etna Creek, within the Livingstone Shire of Queensland, Australia. The facility serves a population of 4,919, primarily from the correctional centre and surrounding area. As an operational plant, it plays a key role in managing wastewater for this inland community. The plant has a designed capacity of 1.00 megalitres per day. Australian wastewater facilities are regulated under state and national guidelines, including the Australian Guidelines for Water Recycling and the Queensland Environmental Protection Act. Plants of this scale typically employ secondary treatment processes such as activated sludge or lagoon systems to meet discharge standards. The treated effluent is discharged into the local catchment, which ultimately drains into the Fitzroy River basin and then into the Coral Sea. The region supports diverse aquatic ecosystems, including wetlands and estuarine habitats that rely on maintained water quality. Proper treatment helps protect downstream environments from nutrient pollution and pathogens.

The plant's discharge flows into the Fitzroy River basin, one of Queensland's largest river systems, which empties into the Coral Sea near Rockhampton. This coastal zone supports seagrass meadows and mangrove forests that are critical for fisheries and migratory bird species. Maintaining low nutrient and pathogen levels in treated effluent is essential to prevent algal blooms and protect marine biodiversity in the Great Barrier Reef lagoon.