In Garland, the wastewater collection and stormwater systems are separate.
Sanitary Sewer System
The sanitary sewer system collects wastewater. Wastewater is used water that drains from toilets, sinks, household drains, and some industrial drains. The wastewater travels through wastewater collection pipes to a wastewater treatment plant where it is treated to strict quality standards. The treated effluent is then released into Duck Creek, a tributary of the Trinity River.
Stormwater enters the storm drainage system through street inlets and drainage channels and goes to lakes and rivers untreated. Stormwater is run-off from rainfall.