To manage storm water runoff, the Williamson County Landfill uses silt fences, rock dams, erosion control mats, and other best management practices. Erosion control devices, including storm water ditches and channels, are inspected weekly and after each significant rainfall to ensure that their intended purpose is accomplished. When necessary, sediment is removed.

To ensure protection of Mustang Creek, Waste Management takes quarterly samples of storm water leaving its site and analyzes them for silt and metals.

With the expansion, storm water will be controlled and routed to storm water detention ponds before discharge to Mustang Creek within authorized limits.