This map indicates the current location of water treatment plants (town water supplies) and sewage treatment plants that discharge into waterways in South-east Queensland. Most sewage treatment plants release waste water downstream of their local water treatment plants, however there are a few exceptions which release either upstream of a treatment plant or into a creek that feeds into a drinking water supply dam.

By the time water is extracted at the Mt Crosby treatment plant [blue dot #9] to supply Brisbane, it has already mixed with discharge from at least 15 sewage treatment plants located upstream.