How is lead in our drinking water regulated?

The United States EPA sets the standards for what is considered a safe exposure to lead in drinking water. Federal law requires municipal water utilities to monitor tap water lead levels in a percentage of the households they served. Corrosion control treatment must be installed if more than 10% of these households have had levels greater than the action level of 15 parts per billion. Utilities are required to replace lead service lines within the next 15 years if a problem persists. The EPA has established a maximum contaminant level goal of zero lead content. This is solely a health goal and is not enforceable on public water systems.

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1. Exactly what is lead?
2. How does lead get into a home's water supply?
3. How can I tell what kind of pipes my home has?
4. How does lead affect people?
5. How is lead in our drinking water regulated?
6. How can I tell if my water has lead in it?
7. How can lead exposure be reduced?