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Federal and California Exhaust and Evaporative Emission Standards for Light-Duty Vehicles and Light-Duty Trucks
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.
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Search the Document Index System (DIS) database to find:
- Advisory Circulars
- Applications for Certification
- Certificates of Conformity
- Certificate Summary Information Reports
- Manufacturer Guidance Letters
- Verify System Documentation
The following tables of exhaust emission standards attempt to consolidate federal and California standards and implementation rates to facilitate comparison and to provide a one-stop resource for these emission standards. However, these tables are not a substitute for the official federal or California regulatory text. In addition, these tables do not reflect some emission standards, such as the federal cold temperature carbon monoxide standards and test procedures, or some optional standards that might apply to some manufacturers (e.g., small volume manufacturers). Each of the tables is potentially confusing without the accompanying Footnotes, Abbreviations and Definitions (PDF) document to help you sort things out (e.g., California calls cars "passenger cars" while EPA calls cars "light-duty vehicles").
Complete Document (PDF) (includes all of the following tables, notes, and definitions) (72K, EPA420-B-00-001, February 2000) (also available as MS Excel file, 175K)
- Federal Certification Exhaust Emission Standards for Light- Duty Vehicles (Passenger Cars) and Light Light- Duty Trucks: Federal Test Procedure (FTP), Cold CO, and Highway & Idle Tests (PDF) (12K)
- Federal Certification Exhaust Emission Standards for Heavy Light- Duty Trucks: Federal Test Procedure (FTP), Cold CO, and Highway & Idle Tests (PDF) (13K)
- Federal and California Certification Exhaust Emission Standards for Light-Duty Vehicles (Passenger Cars), Light- Duty Trucks, and Medium - Duty Vehicles: Supplemental Federal Test Procedure (SFTP)(PDF) (10K)
- Federal Certification Evaporative Emission Standards for Light- Duty Vehicles (Passenger Cars) and Light- Duty Trucks: Evaporative and Onboard Refueling (ORVR) Test Procedures (including National Low Emission Vehicle (NLEV) and Clean Fuel Vehicle (CFV) programs)(PDF) (17K)
- Federal Exhaust Emission Standards Implementation Schedule for Light - Duty Vehicles (Passenger Cars) and Light- Duty Trucks (PDF) (27K)
- California Certification Exhaust Emission Standards for Light- Duty Vehicles (Passenger Cars) and Light Light- Duty Trucks: Federal Test Procedure (FTP)(PDF) (27K)
- California Certification Exhaust Emission Standards for Medium- Duty Vehicles: Federal Test Procedure (FTP)(PDF) (27K)
- California Exhaust Emission Standards Implementation Schedule for Light- Duty Vehicles (Passenger Cars), Light- Duty Trucks, and Medium - Duty Vehicles (PDF) (27K)
- Footnotes, abbreviations and definitions used in the tables of emission standards (PDF) (27K)