Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act

On this page:

• Rule Summary
• Rule History
• Additional Resources

Rule Summary

This rule implements the Clean Air Act language that allows a “major source” of hazardous air pollutants (HAP) to reclassify as an “area source” after acting to limit emissions.

Sources of persistent and bioaccumulative HAP listed in Clean Air Act (CAA) section 112(c)(6) must continue to comply with certain major source emission standards under 112(d)(2) or standards under 112(d)(4) even if these sources reclassify as area sources.

Rule History

9/10/2024 - Final Rule

9/21/2023 – Proposed Rule:  Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act

12/28/2020 – Technical Correction to Final Rule

11/19/2020 – Final Rule

07/31/2019 – Public Hearing Notice

06/25/2019 – Proposed Rule 

01/25/2018 – Guidance Memorandum

Additional Resources

Fact Sheet: Final Rule, Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act (pdf) (141.7 KB)

Fact Sheet: Proposed Rule, Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act (pdf) (185.47 KB)

Fact Sheet: Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act 

Additional Documents Supporting Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act 

Public Hearing

Documents Supporting the  Proposal for Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act

(Note: For 508-compliance questions, please contact Elineth Torres at [email protected].)