Washington, D.C. – Sales of diesel particulate filters (DPFs) for in-use, on-road heavy-duty diesel vehicles operating in California continue at a slow pace, according to the results of a survey released today by the Manufacturers of Emission Controls Association (MECA). According to the results, the total number of verified DPFs sold by MECA member companies for in-use, on-road heavy-duty diesel vehicles operating in California in the first half of 2012 (January 1, 2012 to June 30, 2012) is 3,030 (includes both passive and active filters). Retrofit device manufacturers were expecting this number to be much higher due to the requirements of the California Air Resources Board’s in-use truck and bus regulation (finalized in December 2008 and amended in December 2010). Under the regulation, ARB projected that approximately 12,000 filters would be installed in 2012 (to meet a January 1, 2013 compliance deadline) and that approximately 66,000 filters overall would be installed from 2011 through 2015.

ARB has designated the month of August as “Gear Up for Clean Truck Month” in order to send a clear message that the agency’s in-use truck and bus regulation is in effect and being enforced. Throughout the month, ARB says outreach and enforcement teams will conduct inspections at weigh scales, random roadside locations, fleet facilities, truck stops, and other areas where diesel vehicles are present to ensure full compliance with the regulation’s requirements. Enforcement actions will involve fleet citations and audits.

“ARB’s announcement on stepping up enforcement of their truck and bus regulation this month is warranted and welcomed based on the lackluster California retrofit sales reported by MECA members so far this year,” said MECA’s Executive Director, Joseph Kubsh. “The clean air benefits of the truck and bus regulation can only be realized if the requirements are effectively enforced.”