The required compliance testing done the by City is different from Environmental Protection Agency's (EPA) sampling for the pilot project in zones 2 and 3. Compliance testing measures lead levels throughout the City’s entire drinking water distribution system. The sequential sampling for the pilot project measures lead levels throughout an individual’s homes piping system from the water main to the street to the tap which is more rigorous series of tests.
On a national level, EPA is actively considering potential revisions to the Lead and Copper Rule. The primary goal is to improve the effectiveness of the rule in reducing exposure to lead and copper from drinking water. EPA anticipates proposed rule changes soon.