What is the EPA safe drinking water rule threshold for lead concentration?

The established threshold for lead concentration in drinking water under the EPA’s Safe Drinking Water Rule is 15 parts per billion (ppb). This standard reflects the maximum allowable level of lead in public water systems to protect public health. Lead can have serious health effects, particularly in young children and pregnant women, leading to developmental issues and other serious health concerns.

The 15 ppb limit was set based on considerations of the potential health risks associated with prolonged exposure to lead, even at low concentrations. When the concentration exceeds this threshold, specific actions must be considered, which may include public notification and measures to reduce lead levels in the water supply, as well as monitoring and compliance assessments. This regulation underscores the importance of lead management in drinking water to ensure public safety and health.