https://www.epa.gov/verified-diesel-tech/learn-about-verified-technologies-clean-diesel
Learn about Verified Technologies for Clean Diesel | US EPA
Jan 6, 2026 - Learn about diesel retrofit technologies that EPA has approved or conditionally approved for use in engine retrofit programs.
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https://www.epa.gov/verified-diesel-tech
Verified Technologies for SmartWay and Clean Diesel | US EPA
Mar 23, 2026 - Diesel Technology Assessment Center evaluates and verifies the emission reduction capabilities and durability of emission reduction technologies
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