Mercury Cell ChlorAlkali Plants: National Emissions Standards for Hazardous Air Pollutants (NESHAP)
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Rule Summary
This action promulgates national emission standards for hazardous air pollutants (NESHAP), specifically mercury emissions, from mercury cell chlor-alkali plants. The final rule limits mercury air emissions from these plants. The final rule implements
section 112(d) of the Clean Air Act (CAA) which requires all categories and subcategories of major sources and area sources listed under section 112(c) to meet hazardous air pollutant emission standards reflecting the application of the maximum achievable control technology (MACT).
Rule History
05/06/2022 - Final rule (May 2022)
02/12/2021 - Pre-publication proposed rule; extension of public comment period (pdf) (237 KB)
01/08/2021 - Proposed rule (January 2021) | Proposed rule edits
03/14/2011 - Supplemental proposed rule (pdf) (397 KB)
06/11/2008 - Proposed rule (June 2008) (pdf) (300 KB)
12/19/2003 - Final rule (December 2003) (pdf) (305 KB)
08/22/2002 - Proposed rule; extension of public comment period (pdf) (130 KB)
07/03/2002 - Proposed rule (July 2002) (pdf) (300 KB) & Proposed decision not to regulate (pdf) (151 KB)
Additional Resources
Fact Sheet: Final Amendments to Air Toxics Standards for Mercury Cell Chlor Alkali Plants (pdf)
Fact Sheet: Proposed Amendments to Air Toxics Standards for Mercury Cell Chlor-Alkali Plants
Public Comment Review Tool for Mercury Cell ChlorAlkali Plants (zip) . To use this tool, please download the file to your computer and unzip, then follow the instructions in the included PDF file.
View the supporting documents in the docket folder to find additional related documents to the rules.