EPA Proposes In-use Testing Of Heavy-duty Diesel Emissions

Washington, D.C. — The Washington, D.C.-based Environmental Protection Agency (EPA) has proposed a manufacturer-run, in-use emissions testing program for heavy-duty diesel trucks. Under the program, engine manufacturers would measure emissions from their diesel engines in highway applications using portable onboard emission measurement systems.

EPA is proposing that a pilot program begin 2005, with a fully enforceable program taking effect two years later. The proposal arose from a 2003 settlement agreement between EPA and the Engine Manufacturers Association.

A pre-publication copy of the proposal is available online at http://www.epa.gov/otaq/hd-hwy.htm.