ATA to Ask EPA to Keep California from Requiring Filters for APUs

American Trucking Associations has asked the U.S. Environmental Protection Agency to refuse to allow California to chart its own path on requirements governing auxiliary power units on trucks.

The state’s idling law requires particulate matter filters on APUs mounted on trucks with engines made in 2007 or later.

ATA said in a Sept. 30 letter to EPA that California’s performance requirements for APUs are not “consistent” with the requirements of the Clean Air Act.

Idling laws vary from state to state, said Mike Tunnell, ATA’s director of environmental affairs, but California is the only state trying to require the use of a filter.