Final Rule for Control of Emissions of Air Pollution From Highway Heavy-Duty Engines
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Rule Summary
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The Environmental Protection Agency (EPA) is adopting a new combined emission standard for oxides of nitrogen (NOx) and hydrocarbons (HC) for model year 2004 and later heavy-duty diesel engines used in trucks and buses. The new standard represents a 50 percent reduction in NOx from the 1998 and later model year NOx standard.
- Final Rule: Control of Emissions of Air Pollution From Highway Heavy-Duty Engines (PDF)(37 pp, 432 K, published October 21, 1997)
- Final Regulatory Impact Analysis (PDF)(144 pp, 3 MB, EPA-420-R-97-011, September 1997)
- Summary and Analysis of Comments: Control of Emissions of Air Pollution from Highway Heavy-Duty Engines (PDF)(81 pp, 8 MB, September 1997, EPA-420-R-97-102)
Rule History
Proposed Rule and Related Materials
- Proposed Rule (PDF)(25 pp, 359 K, published August 31, 1995)
Additional Resources
Technical Support Document
- Estimated Economic Impact of New Emission Standards for Heavy-Duty On-Highway Engines (PDF)(87 pp, 422 K, EPA-420-R-97-009, March 1997)
Fact Sheet
- New Emission Standards For HeavyDuty Diesel Engines Used In Trucks And Buses (PDF)(4 pp, 14 K, EPA-420-F-97-016, October 1997)