Q: Are lead action levels in public waters systems different than school systems?

The action level for lead is the level at which water systems must take additional steps to reduce consumers’ exposure to lead from drinking water. The two lead action levels differ because...

The action level for lead is the level at which water systems must take additional steps to reduce consumers’ exposure to lead from drinking water. The two lead action levels differ because of the different problems they seek to detect and the different monitoring protocols used in the two situations. The 20 parts per billion (ppb) action level and sampling protocol for lead in schools is designed to pinpoint specific water fountains and outlets that require remediation (e.g., water cooler replacement). The 15 ppb find action level and sampling protocol for public water systems is designed to identify system-wide problems with control of lead corrosion and not problems in single outlets (56 FR 26460, 26479; June 7, 1991).