Since 2003, Werner & Mertz has voluntarily had its Mainz site and since 2005 its Hallein (Austria) site validated against EMAS criteria. An independent EMAS expert regularly examines the production and manufacturing facilities. EMAS , the Eco-Management and Audit Scheme of the European Union is considered to be the world's most demanding system for sustainable environmental management.

EMAS companies give strong impetus for a sustainable and legally compliant economy. However, they cannot take full advantage of EMAS benefits, as the European Parliament has banned the use of the EMAS logo on products and their packaging.