The EPA is proposing to amend the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs), commonly known as the Mercury and Air Toxics Standards (MATS). Specifically, the EPA is proposing to amend the surrogate standard for non-mercury (Hg) metal HAP (filterable particulate matter (fPM)) for existing coal-fired EGUs; the fPM compliance demonstration requirements; the Hg standard for lignite-fired EGUs; and the definition of startup. These proposed amendments are the result of the EPA’s review of the May 22, 2020 residual risk and technology review (RTR) of MATS.


Comments. Comments must be received on or before June 23, 2023. Under the Paperwork Reduction Act (PRA), comments on the information collection provisions are best assured of consideration if the Office of Management and Budget (OMB) receives a copy of your comments on or before May 24, 2023.

Public hearing. The EPA will hold a virtual public hearing on May 9, 2023. See SUPPLEMENTARY INFORMATIONfor information on requesting and registering for a public hearing.

Read more >>–and-oil-fired-electric-utility-steam


You may send comments, identified by Docket ID No. EPA–HQ–OAR–2018–0794, by any of the following methods:

Federal eRulemaking Portal:​ (our preferred method). Follow the online instructions for submitting comments.

Email: . Include Docket ID No. EPA–HQ–OAR–2018–0794 in the subject line of the message.