ERG Supports Clean Air Act Settlements

Tailpipe of a VW car

Project Brief

The U.S. Environmental Protection Agency often turns to ERG to estimate the excess emissions caused by violations of the Clean Air Act, including excess emissions caused by vehicles equipped with defeat devices. ERG designs a customized modeling approach, specific to each case, to estimate excess pollution from affected vehicles or engines. EPA uses the modeling results as one input in crafting enforcement settlements. ERG applies similar expertise to model the benefits of programs to reduce air pollution, including programs required by enforcement settlements.

Learn how ERG can support state emission reduction programs.


U.S. Environmental Protection Agency