Category Archives: Ozone

It’s More Important for EPA to Ensure that States Are Good Neighbors Than That They are Perfect Neighbors

Last week, D.C. Circuit Court of Appeals rejected challenges to EPA’s “Revised Cross-State Air Pollution Update Rule”.  The Court found that the Rule was “an appropriate exercise of EPA’s statutory authority”. 

I find the decision noteworthy for two reasons.  First, the decision is a full-throated endorsement of judicial deference to agency decision-making.  Of course, this isn’t a Chevron case;… More

EPA Will Reconsider the Ozone NAAQS — What Is An Adequate Margin of Safety, Anyway?

On Friday, EPA announced that it was reconsidering its 2020 decision to leave the National Ambient Air Quality Standards for ozone unchanged.  The reconsideration will be based on the existing record.  The notice does not identify any specific perceived flaws in the 2020 decision.  However, EPA stated that it:

will reconsider the decision to retain the ozone NAAQS in a manner that adheres to rigorous standards of scientific integrity.… More