EPA Proposed Rule on Subpart CCCC Burden Calculations

The EPA has issued a proposed rule that seeks to amend the burden calculations associated with Subpart CCCC of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for certain manufacturing industries. This revision specifically targets how compliance burdens are quantified, potentially impacting reporting requirements and cost assessments for affected facilities. The docket number for this rulemaking is EPA-HQ-OAR-2025-0068.

Affected manufacturers must review the proposed changes to burden calculations and consider submitting comments to the EPA. The agency is seeking input on the accuracy and fairness of the revised methodology. While no specific compliance deadline is provided for the final rule, regulated entities should prepare for potential adjustments to their compliance strategies and reporting obligations once the rule is finalized. Failure to comply with future requirements could result in enforcement actions.