Warrumbungle Sewer has sewerage effluent collection and treatment plants in Coonabarabran, Baradine, Coolah and Dunedoo. There are 2,544 sewerage connection services across the shire.
Sewer services are managed to meet license requirements set by the NSW Environment Protection Authority for discharge of effluent to the environment, requiring monitoring and reporting to the state government in accordance with best practice management guidelines.
Further information on Sewer management guidelines and licensing is available at the Environmental Protection Authority website.