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Lead Designations Guidance

EPA provided guidance for making the lead designations process in the preamble for the lead National Ambient Air Quality Standards (NAAQS) final rulemaking (73 FR 6694; November 12, 2008). On August 21, 2009, EPA provided additional information on the timeline for designating areas and identified where key designation – related subjects can be found in the lead NAAQS preamble.

  • Lead NAAQS Final Rule (pdf) (100 pp, 688 KB) - Federal Register - November 12, 2008
  • Lead Designations Guidance Memo (pdf) (731.68 KB)

Lead Designations

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Last updated on April 11, 2025
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