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Under the Clean Air Act, EPA is required to periodically review and if appropriate revise the air quality criteria for the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS). In 2016, EPA published a final decision to retain the existing primary and secondary NAAQS for lead (established in 2008) that provide protection for public health and welfare. The current review includes the preparation of an Integrated Review Plan, an Integrated Science Assessment and, if warranted, a Risk/Exposure Assessment, and also a Policy Assessment by EPA, with opportunities for review by EPA’s Clean Air Scientific Advisory Committee (CASAC), at public meetings, and the public, announced at stakeholder meetings, EPA’s website and in the Federal Register. Opportunities for public participation in the development of these assessments include through the offering of comments to the CASAC at public CASAC meetings and directly to the EPA. These assessments inform the Administrator’s proposed decision as to whether to retain or revise the standards. This decision will be published in the Federal Register, and announced on EPA’s website, with opportunity provided for public participation, such as submission of comments to the rulemaking docket and public hearings. Additionally, opportunity is provided for Tribal consultation. The Administrator’s final decisions will take into consideration the review of documents and public comment on the proposed decision.