March 2018

The list below shows MECA suppliers of diesel retrofit emission control devices for the control of PM and/or NOx emissions.

Note: For the current list of U.S. EPA/California ARB verified diesel retrofit products, click on the respective link below:


Johnson Matthey

Ms. Melanie Pastore

Regional Account Representative
900 Forge Avenue, Suite 100
Audubon, PA 19403 USA
Phone: (484) 320-2240
Fax: (484) 320-2306
Technology: DOC, DPF (passive and active), FTF, DPF + EGR, DOC + SCR, DPF + SCR


CCV – crankcase ventilation system
DOC – diesel oxidation catalyst
DPF – diesel particulate filter
EGR – exhaust gas recirculation
FTF – flow-through filter
LNC – lean NOx catalyst
SCR – selective catalytic reduction