Southlake water is tested for lead and copper using the precise protocol outlined by the U.S. Environmental Protection Agency (U.S. EPA) and the Texas Commission on Environmental Quality (TCEQ). This protocol is designed to test for lead and copper under the worst conditions possible. For instance, lead and copper samples are collected from “first draw” samples, meaning the water has been in contact with a customer’s plumbing for at least six hours without disruption and will be the first water drawn in the morning. Since water can dissolve metals into the water through a process known as leaching, drawing the first water from a faucet in the morning should provide the worst conditions possible for lead and copper leaching. Additionally, since water can become more corrosive the warmer it becomes, samples must be taken during the summer months.
Southlake collects and tests 30 routine samples once every year for lead and copper as required by the TCEQ. Southlake then follows chain of custody protocol to deliver the samples to an approved, accredited testing laboratory.