LITTLE ROCK — The U.S. Environmental Protection Agency in 1997 set standards for emissions starting with the model year 2004 trucks and heavy-duty diesel truck engines and ending with the model year 2010 trucks and heavyduty engines. The EPA regulates emissions such as sulfur dioxide, nitrogen oxide and particulate matter.
2004
Models must meet lower
nitrogen oxide levels.
2007
Models must meet lower particulate matter levels.
2010
Models must meet the
lowest threshold of nitrogen oxide emission
when they roll off the production lines.
Business, Pages 75 on 09/20/2009