In 2007 the Air Resources Board (ARB) adopted a regulation to reduce diesel particulate matter (PM) and oxides of nitrogen (NOx) emissions from in-use (existing) off-road heavy-duty diesel vehicles in California.Labeling & Reporting became effective in 2009 and in 2013 the EPA authorized the enforcement of this regulation.
The rule applies to heavy-duty, off-road diesel equipment used in construction, mining and industrial operations.
Examples: wheel loaders, crawler tractors, dozers, motor graders, excavators, skid steers, backhoes, forklifts, airport ground support equipment.
The regulation is divided into small, medium, and large fleets.
Note: All entities are required to report their entire fleet inventory and annually update the California Air Resources Board on any fleet changes.