What are the MATS Revisions from September 2020?

Learn about the final revisions to the Mercury and Air Toxins Standards (MATS) and where to find resources on these revisions.
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What are the September 2020 MATS Revisions? 

On September 9, 2020 the U.S. Environmental Protection Agency (EPA) published the final changes to the Mercury and Air Toxins Standards (MATS)limiting the allowable amount of mercury (Hg) and other pollutants from coal and coal-fired power plants. These changes reflect the EPA’s goal of creating a unified reporting program that utilizes the Emission Collection and Monitoring Plan System (ECMPS) tool to evaluate and submit electronic report files. The EPA’s website has a page that lists and explains all of the revisions to the MATS rule. The MATS revisions from September 2020 will take mandatory effect in 2024. 

 

What is the “Preamble” to the MATS Revisions? 

The EPA released a preamble to the MATS revisions that gives necessary insight and background information to understanding the changes. The preamble identifies: 

 

  • The sections added to the existing rule, 
  • The sections changing in the existing rule, 
  • The reasoning behind these changes, and 
  • The reasoning for not including other suggested changes. 

 

Where Can I Find Resources to Help Me Better Understand the September 2020 MATS Revisions? 

ESC Spectrum’s MATS Readiness Center is a central point of reference for all of the MATS resources that ESC Spectrum has to offer.  

 

ESC Spectrum Senior Regulatory Specialist Jon Konings extracted the language of the preamble from the Federal Register and highlighted the important changes in this document. 

 

Jon Konings also presented two webinars over the MATS revisions; the first webinar focuses solely on the preamble, and the second webinar focuses on the major changes of the revisions.

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