Search

EPA Reverses 2020 Clean Air Act Finding for Power Plants

Posted on 3/6/2023 by Roger Marks

On March 6, US EPA announced a finding that it is “appropriate and necessary” to regulate coal- and oil- fired electricity generating units (i.e., power plants) under section 112 of the Clean Air Act. In the same action, the agency revoked an earlier, opposite finding published in May 2020.

This Final Action from EPA is the latest development in a regulatory push-and-pull that started in 2012 when EPA finalized the Mercury Air Toxics Standards or MATS Rule, adding power plants to the list of “major sources” subject to national emissions standards for hazardous air pollutants or NESHAPs.

Since 2012, two important questions have guided the Rule’s trajectory:

1.) To what extent must US EPA consider costs to industry when developing and implementing environmental regulations?

2.) How should US EPA estimate and measure the “benefits” gained from regulating (or further restricting) a pollutant or a source of air pollution?

Section 112 of the Clean Air Act directs EPA to set limits on emissions of hazardous air pollutants (HAPs) and to require “major sources” of HAP emissions to implement pollution control technology that will reduce emissions to the maximum extent possible. This is referred to as “maximum achievable control technology” or MACT.

From the final action: 

“…the EPA concludes that the framework applied in the May 22, 2020 finding was ill-suited to assessing and comparing the full range of advantages and disadvantages, and after applying a more suitable framework, the 2020 determination is revoked. Additionally, the EPA is reaffirming that it is appropriate and necessary to regulate HAP emissions from coal- and oil-fired EGUs…” 


EPA Reverses 2020 Clean Air Act Finding for Power Plants


Here, in broad strokes, is a time line of relevant key events since 2012: 

2015 / Michigan v. EPA Supreme Court Decision  

A challenge to EPA’s MATS Rule reached the Supreme Court in 2015. In Michigan v. EPA, the court ruled that EPA should have considered the costs to power plants before implementing the regulation.

Section 112 of the Clean Air Act authorizes EPA to regulate air pollution from an industry if they determine a regulation is “appropriate and necessary.” In a 5-4 opinion, the court stated that EPA unreasonably interpreted the Clean Air Act by not considering cost as a relevant factor in its decision to regulate power plants. The cost of the regulation to power plants, as estimated by EPA, was about $9.6B/year. 

2016 / EPA’s Supplemental Cost Finding

EPA responded to the Michigan decision by presenting a supplemental cost-benefit analysis of its rule to regulate emissions of HAPS from power plants. The supplemental finding re-affirmed EPA’s earlier stance that regulated HAP emissions from power plants is, in fact, “appropriate and necessary.” 

2020 / Revised Response to Michigan v. EPA 

On May 22, 2020, EPA published a Final Rule to revise the 2016 supplemental cost finding and response to the Supreme Court. After re-calculating the costs and benefits of the MATS Rule using a different approach, EPA determined that the 2012 rule was not “appropriate and necessary.” 

This rulemaking did not change the air quality standards established in the MATS rule, and it did not eliminate the source category for power plants under the Clean Air Act, section 112. At this time, EPA also requested public comment about whether to repeal or revise the 2012 MATS Rule. 

** 

That brings us up to Monday, March 6, when EPA published a final action to revoke the 2020 finding and re-affirm its stance that regulated HAP emissions from power plants is “appropriate and necessary.”  

Clean Air Compliance Online Training

Be confident you know your responsibilities for Clean Air Act compliance. The Clean Air Act Regulations Online Course guides you through EPA’s major air programs—including how to identify the air permitting, pollution control, and reporting requirements you must know to achieve and maintain compliance.

You can catch the next two-day Complete Environmental Regulations Webinar on March 16–17. 

Find a Post

Compliance Archives

Lion - Quotes

Convenient; I can train when I want, where I want.

Barry Cook

Hazmat Shipping Professional

The instructor clearly enjoys his job and transmits that enthusiasm. He made a dry subject very interesting and fun.

Teresa Arellanes

EHS Manager

The instructor was very patient and engaging - willing to answer and help explain subject matter.

Misty Filipp

Material Control Superintendent

I was able to present my scenario to the instructor and worked thru the regulations together. In the past, I attended another training firm's classes. Now, I have no intention of leaving Lion!

Diana Joyner

Senior Environmental Engineer

Excellent course. Very interactive. Explanations are great whether you get the questions wrong or right.

Gregory Thompson

Environmental, Health & Safety Regional Manager

The course was very informative and presented in a way that was easily understood and remembered. I would recommend this course.

Jeffrey Tierno

Hazmat Shipping Professional

Amazing instructor; real-life examples. Lion training gets better every year!

Frank Papandrea

Environmental Manager

Best course instructor I've ever had. Funny, relatable, engaging; made it interesting and challenged us as the professionals we are.

Amanda Schwartz

Environmental Coordinator

We have a very busy work schedule and using Lion enables us to take the course at our own time. It makes it easy for me to schedule my employees' training.

Timothy Mertes

Hazmat Shipping Professional

Much better than my previous class with another company. The Lion instructor made sense, kept me awake and made me laugh!

Marti Severs

Enterprise Safety Manager

Download Our Latest Whitepaper

The definitive 10-step guide for new hazardous materials shipping managers. Quickly reference the major considerations and details that impact hazmat shipping compliance.

Latest Whitepaper

By submitting your phone number, you agree to receive recurring marketing and training text messages. Consent to receive text messages is not required for any purchases. Text STOP at any time to cancel. Message and data rates may apply. View our Terms & Conditions and Privacy Policy.