Welcome to the Clean Diesel ClearingHouse

The CDCH is a trusted, web‐based tool that enables users to determine the best available emission reduction technology (BAT), including verified products (and other product options allowed by specific program requirements) for retrofitting diesel‐powered vehicles and equipment. The CDCH can be used to support retrofit products, clean fuel options and clean fuel vehicle selections that satisfy BAT regulations, as well as voluntary emission reduction program requirements.

HelpGo here for basic help and to contact us
AccessibilityGo here for accessibility contact page
Find RetrofitsGo here to find general retrofit solutions for your vehicle
TechnologiesGo here to find information about technology options
GuidanceGo here for general Guidance
BAT InfoGo here to find more information on BAT requirements