The EPA’s MATS Repeal May Signal a Broader Shift on Ancillary Benefits

Short summary

The EPA's MATS repeal signals a shift in how the agency evaluates environmental regulations—specifically whether it will count ancillary health benefits beyond the target pollutant. Two D.C. Circuit cases challenge the repeal's lawfulness under Administrative Procedure Act principles. Future EPA rulemakings on power plant emissions and PM2.5 standards will test whether this framework holds.

• •EPA's MATS repeal may signal broader policy shift on how ancillary benefits are valued in environmental rules
• •Legal challenges filed in D.C. Circuit question whether EPA can omit health benefits from cost-benefit analysis
• •Upcoming rulemakings on power plant GHG standards and PM2.5 will reveal if this new framework is sustainable

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