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National Ambient Air Quality Standards (NAAQS)

Lead (Pb) Standards


December 19, 2014 - After carefully reviewing the most recent available scientific evidence, and consulting with the Agency’s independent science advisors, EPA is proposing to retain, without revision, the national ambient air quality standards for lead.
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The Clean Air Act requires EPA to set national ambient air quality standards (NAAQS) for lead and five other pollutants considered harmful to public health and the environment (the other pollutants are ozone, particulate matter, nitrogen oxides, carbon monoxide, and sulfur dioxide. The law also requires EPA to periodically review the standards to ensure that they provide adequate health and environmental protection, and to update those standards as necessary. Learn more about the NAAQS review process.

Contact: Deirdre Murphy

Documents from Current Review

Basic Information on Lead

Documents from Review Completed in 2008

Documents from Previous Reviews

Table of Current NAAQS

Table of Historical Lead NAAQS

Information on Lead Monitoring


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