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Clean Air Nonroad Diesel - Tier 4 Final Rule
Clean Air Rules of 2004
The actions described here are part of the suite of inter-related rules collectively known as the Clean Air Rules of 2004. These rules address ozone and fine particle pollution, nonroad diesel emissions, and power plant emissions of sulfur dioxide, nitrogen oxides and mercury.
Related Topics
- Preamble and Regulations
- Announcement Materials
- Regulatory Impact Analysis
- Summary and Analysis of Comments
- Related Links
EPA has adopted a comprehensive national program to reduce emissions from future nonroad diesel engines by integrating engine and fuel controls as a system to gain the greatest emission reductions. To meet these emission standards, engine manufacturers will produce new engines with advanced emission-control technologies similar to those already expected for highway trucks and buses. Exhaust emissions from these engines will decrease by more than 90 percent. Because the emission-control devices can be damaged by sulfur, we are also adopting a limit to decrease the allowable level of sulfur in nonroad diesel fuel by more than 99 percent.
These reductions in NOx and PM emissions from nonroad diesel engines will provide enormous public health benefits. EPA estimates that by 2030, controlling these emissions would annually prevent 12,000 premature deaths, 8,900 hospitalizations, and one million work days lost.
NOTE: You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.
Preamble and Regulations
- Federal Register Notice: Entire Document (PDF) (317 pp, 3.5MB)
- Part A, pages 38957-39006 (also available as a PDF file, 50 pp, 720K)
- Part B, pages 39007-39056 (also available as a PDF file, 50 pp, 544K)
- Part C, pages 39057-39106 (also available as a PDF file, 50 pp, 536K)
- Part D, pages 39107-39156 (also available as a PDF file, 50 pp, 380K)
- Part E, pages 39157-39206 (also available as a PDF file, 50 pp, 644K)
- Part F, pages 39207-39256 (also available as a PDF file, 50 pp, 620K)
- Part G, pages 39257-39273 (also available as a PDF file, 17 pp, 267K)
Announcement Materials
- Press Release: New Clean Diesel Rule Major Step in a Decade of Progress (May 11, 2004)
- Press Release: Leavitt to Sign Clean Air Nonroad Diesel Rule (May 10, 2004)
- Clean Air Nonroad Diesel Rule Summary (also available as a PDF file, 1 pg, 69K, EPA420-F-04-029, May 2004)
- Clean Air Nonroad Diesel Rule Fact Sheet (also available as a PDF file, 5 pp, 122K, EPA420-F-032, May 2004)
- Clean Diesel Programs Milestones (EPA420-F-04-034, May 2004)
- Clean Air Nonroad Diesel Final Rule - Facts and Figures (EPA420-F-04-037, May 2004)
- Many Machines for Many Jobs - Characterization of Today's Nonroad Diesel Industry (May 2004)
- Diesel Particulate Filters
Regulatory Impact Analysis
- Regulatory Impact Analysis (PDF) (Full Document, 1,568 pp, 8.5MB, EPA420-R-04-007, May 2004)
- Individual Chapters:
- Executive Summary (PDF) (14 pp, 185K)
- Chapter 1: Industry Characterization (PDF) (42 pp, 513K)
- Chapter 2: Air Quality, Health, and Welfare Effects (PDF) (155 pp, 1MB)
- Chapter 3: Emission Inventory (PDF) (105 pp, 450K)
- Chapter 4: Technologies and Test Procedures for Low-emission Engines (PDF) (184 pp, 1.3MB)
- Chapter 5: Fuel and Standard Feasibility (PDF) (112 pp, 463K)
- Chapter 6: Estimated Engine and Equipment Costs (PDF) (98 pp, 421K)
- Chapter 7: Estimated Cost of Low-sulfur Fuels (PDF) (220 pp, 1.3MB)
- Chapter 8: Estimated Aggregate Cost and Cost Per Ton of Reduced Emissions (PDF) (155 pp, 1MB)
- Chapter 9: Cost-Benefit Analysis (PDF) (274 pp, 1.4MB)
- Chapter 10: Economic Impact Analysis (PDF) (206 pp, 669K)
- Chapter 11: Small Business Fexibility Analysis (PDF) (28 pp, 174K)
- Chapter 12: Regulatory Alternatives (PDF) (22 pp, 161K)
Summary and Analysis of Comments
- Summary and Analysis of Comments: Control of Emissions from Nonroad Diesel Engines (PDF) (567 pp, 1.9MB, EPA420-R-04-008, May 2004)
Related Links
- Proposed Rule: Access the proposed rule, fact sheets, and regulatory support documents.
- NONROAD Model: Access the NONROAD model used to estimate emission inventories for this rulemaking and technical support documents.
For further information or assistance regarding this web page, please contact the Assessment and Standards Division Information Line at (734) 214-4636 or E-mail: asdinfo@epa.gov.