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21st Century North Carolina Air Quality

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Mobile Sources

Last Page Update: 12/09/2006
Mobile Sources

Focus on National Clean Diesel Campaign

The EPA's National Clean Diesel Campaign (NCDC) is receiving greater attention as more evidence points to the contribution of exhaust from diesel engines in causing public health problems. The effort consists of both regulatory and voluntary initiatives, including the 2007 Highway Engine Rule, the Clean Air Nonroad Diesel Rule, cleaner fuels, retofit and repair of exising fleets, and reductions in engine idling.

On February 20, 2006, the EPA announced the award of money to 37 school districts around the nation to lower diesel emissions in school bus fleets by replacing older buses with new, cleaner models. In North Carolina, no model year 2005 or 2006 heavy duty diesel engine may be sold, leased, or registered within the state unless it has been certified by CARB as meeting specific requirements.

Other Top Stories and Links

Admin. Correction to EPA Rule to Remove RFG Oxygen Content Requirement - 05/11/06.
EPA Final Rule for Removal of RFG Oxygen Content Requirement - 05/08/06.
Changes to RFG Oxygen Content and Revision of Commingling Rule - 05/05/06.
EPA Cancels Order for Registration of Platinum GaSaver Fuel Additive - 05/02/06.
Technical Amendments to Hwy and Nonroad Diesel Rules and Rule Proposal- 05/01/06.
EPA to allow Improved Fuel Testing Methods for Five ASTM Test Methods - 04/03/06.
Amendments to Tier 2 Motor Vehicle Emission Regulations - Clean Diesel Vehicles - 03/30/06.
Proposed Controls for Benzene and Toxics from Gasoline and Mobile Sources - 03/29/06.
Final rule - Transportation Conformity for new PM2.5 amd PM10 - 03/10/06.
EPA proposes Benzene and Toxics Reduction for Gasoline and Mobile Sources.
EPA revises Mobile Source Air Toxics (MSAT) default baseline values.
EPA final rule for Transportation Conformity - PM2.5 precursors.
EPA's Transportation and Air Quality web page.
EPA's Mobile Source Air Toxics web page.

Key Federal Register Items



EPA Proposes Changes to NAAQS Particulate Standards

The EPA has proposed changes to the national ambient air quality standards (NAAQS) for particulate matter (PM). The proposed changes appeared in the federal register on January 17, 2006. Under the proposed revisions, the 24-hour standard for fine particles (PM2.5) would be lowered to 35 micrograms per cubic meter. (See FR for Jan. 17, 2006.) An advanced notice of proposed rulemaking for the transition to new or revised standards was published on February 9, 2006.