What does the Lead and Copper Rule require from systems with lead/copper exceedances?

The Lead and Copper Rule mandates that drinking water systems with lead or copper levels exceeding the action levels must replace the affected service lines within a specified timeframe, typically set at 15 years. This requirement is crucial for protecting public health, as lead and copper can pose significant health risks if they leach into the drinking water. The rule focuses on proactive measures to reduce these risks through the replacement of service lines, which is a direct method of addressing potential contamination at the source.

In this context, other options do not align with the specific requirements of the rule. For instance, immediate closure of affected pipes does not provide a feasible or practical solution for existing infrastructure and could disrupt service significantly. Regular public notifications—while important for transparency—are not a substitute for action in terms of remediation and risk reduction. Lastly, relying solely on increased treatment measures may not effectively mitigate the risks associated with lead and copper contamination, as these metals can still leach into water supplies unless the sources, such as service lines, are adequately addressed.