This page contains a fact sheet on the 2016 decision to retain the existing standards, and also fact sheets and additional information related to the setting of the existing standards in 2008.

• Final Decision National Ambient Air Quality Standards for Lead (PDF)(4 pp, 85 K, )
  On September 16, 2016, EPA announced its decision to retain, without revision, the national ambient air quality standards for lead of 0.15 ug/m3, in terms of a 3- month average concentration.
• 2015 Proposed Decision on National Ambient Air Quality Standards (NAAQS) for Lead (Pb) Fact Sheet (PDF)(4 pp, 81 K, 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.
• October 2008 Final National Ambient Air Quality Standards (NAAQS) for Lead (Pb) (PDF)(21 pp, 781 K, October 2008)
  This presentation provides an overview of the updated lead standards, the new evidence for the revisions, the new timeline for compliance and the health benefits and costs for the new standards.
• Final Revisions to the National Ambient Air Quality Standards (NAAQS) for Lead (Pb) Fact Sheet (PDF)(6 pp, 92 K, November 12, 2008)
  EPA has substantially strengthened the national ambient air quality standards for lead. The revised standards will improve health protection for at-risk groups, especially children.
• Regulatory Impact Analysis of the Proposed Revisions to the National Ambient Air Quality Standards (NAAQS) for Lead (Pb) (PDF)(177 pp, 2 MB, October 2008)
  This May 2008 Regulatory Impact Analysis (RIA) estimates the incremental costs and monetized human health benefits of attaining a revised primary lead (Pb) National Ambient Air Quality Standard (NAAQS).