EPA Grants First-Ever Tier 4 Engine Exemption to Support New England Lobster Industry

The US Environmental Protection Agency has exempted a specific new lobster boat model in Chatham, Massachusetts, from Tier 4 marine engine requirements — marking the first time the agency has invoked this exemption authority since the waiver process was established in 2024.
The exemption allows the Chatham vessel builder to use a Tier 3 engine after EPA determined that currently available Tier 4 engines cannot fit within the applicant's vessel design while maintaining essential operational requirements. The exempt engine must meet Tier 3 emission standards...
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