Particulate Emissions from Diesel-Fueled Engines as a Toxic Air Contaminant

This page last reviewed July 29, 2008


The staffs of the Air Resources Board (ARB or Board) and the Office of Environmental Health Hazard Assessment (OEHHA) have been evaluating diesel exhaust since 1989 under California's air toxics program, for potential identification as a toxic air contaminant (TAC). A draft report was first released in June 1994, for public review and comment. A revised draft report was released in May 1997. A third draft report was report released for public review in February 1998. The February 1998 report was formally reviewed and approved by the Scientific Review Panel (SRP) at its April 22, 1998, meeting.

The final report and a staff report are available in our "formal" rulemaking activity referenced below.

Fact Sheets

  • The Toxic Air Contaminant Identification Process: Toxic Air Contaminant Emissions from Diesel-Fueled Engines  (PDF - 10K)
  • California's Process to Reduce Health Risks Posed by Toxic Air Contaminant Emissions from Diesel-Fueled Engines  (PDF - 14K)


Rulemaking Activity


The regulatory documents pertaining to the formal rulemaking activity beginning with the 45-day public hearing.

Diesel Programs
Diesel Fuel Program
Diesel Activities - Related Programs, Plans and Other Topics


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