Corrosive water can dissolve lead from plumbing materials in service lines and home plumbing. By using chemicals to control the corrosivity of the water, lead exposure can be reduced. The City of Sugar Land has a corrosion control plan, as part of the Lead and Copper Rule. The system’s corrosion control technique is to adjust pH so the treated water is non-corrosive to metal. Over time, this process has resulted in Sugar Land’s treated water forming a protective scale on the inside of pipes that prevents the leaching out of materials such as lead.
In 2021, TCEQ approved optimal pH ranges for the system to operate within at all times. Monitoring is performed every two weeks at the point where the treated water leaves each treatment plant and quarterly at locations throughout the distribution system. Results of this monitoring are reported to Texas Commission on Environmental Quality.
The City of Sugar Land conducts lead and copper testing, as required by the TCEQ. Samples are collected and analyzed every three years from each of the city’s water systems. The City of Sugar Land was awarded a reduced sampling schedule of every three years because we have repeatedly demonstrated that the water systems meet the federal government's requirements. To date, the 90th percentile results for all of the city’s sampling events have been well below the Action Level of 0.015 mg/l for lead.