On July 6, 2026, the U.S. Environmental Protection Agency published a final rule amending the National Emission Standards for Hazardous Air Pollutants (NESHAP) applicable to the Plywood and Composite Wood Products source category. Codified at 40 CFR Part 63, Subpart DDDD, the revisions establish updated maximum achievable control technology (MACT) emission limits and work practice standards for a range of hazardous air pollutants (HAPs), including formaldehyde, methanol, and mercury. The rulemaking reflects EPA's continued review of NESHAP standards and marks a significant regulatory development for manufacturers operating in this sector.
Under the final rule, existing plywood and composite wood products facilities must achieve compliance by July 6, 2029. This three-year window is intended to give affected operators time to evaluate current emissions performance, assess the adequacy of existing control technologies, and implement any additional measures needed to meet the revised MACT limits. Facilities will also need to align monitoring, recordkeeping, and reporting practices with the amended requirements to demonstrate ongoing compliance once the deadline arrives.
For manufacturers, the practical implications extend beyond the emission limits themselves. Companies should anticipate potential capital expenditures associated with control technology upgrades, revisions to standard operating procedures to reflect new work practice requirements, and enhanced compliance documentation. Environmental, health, and safety personnel may need to coordinate closely with engineering, operations, and finance functions to develop a realistic compliance roadmap over the coming three years, including interim milestones for testing, permitting, and staff training.
Now is an appropriate time for affected facilities to conduct a gap analysis comparing current emissions and operational practices to the revised standards. Early engagement with permitting authorities, control technology vendors, and outside counsel can help identify cost-effective compliance pathways and reduce the risk of last-minute expenditures or enforcement exposure as the July 2029 deadline approaches. Companies with multiple facilities may benefit from a coordinated, enterprise-wide approach to planning and budgeting.
This update is provided for general informational purposes only and does not constitute legal advice. Companies subject to the revised NESHAP should consult qualified counsel to obtain guidance tailored to their specific facilities, operations, and compliance obligations.