EPA revises air pollution analysis framework for power plant rules

The new framework removes dollar values from health impacts of key pollutants and alters a long-standing approach to evaluating clean air rules.

On the Dash:

• The EPA stopped monetizing health benefits when regulating PM2.5 and ozone pollutants.
• The change was disclosed in a preliminary version of a new power plant emissions rule posted on the EPA’s website late last week
• The agency will still assess health impacts but only weigh industry compliance costs in monetary terms.

The Environmental Protection Agency (EPA) has changed how it evaluates air pollution regulations, opting to stop assigning a monetary value to human health benefits when setting certain clean air rules, according to a New York Times report.

The updated approach applies to regulations governing fine particulate matter (PM2.5) and ozone. Both pollutants are widely regulated due to their documented impacts on human health. The change appeared in a preliminary version of a new power plant emissions rule posted on the EPA’s website late last week.

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Under the revised framework, the agency will continue to evaluate industry compliance costs but will no longer calculate the dollar value of avoided deaths or illnesses associated with reductions in PM2.5 and ozone. The EPA said previous efforts to monetize these health benefits relied on estimates that were too uncertain.

The agency stated it will continue to consider the health impacts of these pollutants but will not assign a specific monetary value. EPA officials said emissions will continue to be quantified while the agency works to improve its modeling before monetizing those impacts again.

This marks a significant shift from longstanding EPA practice, which typically compared regulatory compliance costs with estimated economic benefits associated with improved health outcomes. The agency detailed its rationale within the power plant rule, noting that declining emissions and evolving science have made impact estimates less precise.

The move has drawn attention because cost-benefit analyses play a central role in shaping federal environmental regulations. Industry groups have previously criticized the EPA’s methods for calculating health benefits, arguing they overstated gains and underestimated uncertainty.

The policy shift is part of a broader set of environmental actions taken under the Trump administration. In recent weeks, the administration has withdrawn the United States from several international climate-focused organizations and signaled plans to revise federal authority over greenhouse gas regulations.

The EPA’s new approach may face legal scrutiny. Courts have historically required agencies to weigh both costs and benefits when issuing regulations. Any challenges would likely focus on whether the revised framework meets established administrative standards.