Deutsches Institut für Bautechnik (DIBt) is an authority of the German Länder Governments for a uniform fulfillment of technical tasks in the field of public law. DIBt is an authority which issues certificates for WWTP. This certificate is a must for sale in Germany and is also respected in other countries (f.e. Austria).
www.dibt.de

SINTEF (Norway) is a broad, multidisciplinary research organisation with international top-level expertise in the fields of technology, the natural sciences, medicine and the social sciences.

SP Technical Research Institute of Sweden is the national institute for technical evaluation, research, testing and works closely with companies, universities, institutes of technology and other organisations.

Nova Scotia (Canada) provides certification of persons operating classified water and wastewater facilities in Nova Scotia is mandatory under the Water and Wastewater Facilities and Public Drinking Water Supplies Regulations.

Generalitat Valenciana (Spain) – government institution has confirmed the conformity of the declared standards

PCT (Russia) - The certificate of quality issued by the Russian certification system. Confirms the compliance with regulatory acts.

SPSC (Lithuania) - The main goal of SPSC is to provide services of certification of construction products, assessment of consistency of performance, testing and assessment of internal production control upon clients applications.

The Lithuania Green Building Council (LGBC) - is a non-profit organization, actively promoting the creation of sustainable environment and spurring innovations in the design, construction and operation of green buildings in Lithuania.

TÜV - implement management system according to ISO 9001, environmental management ISO 14001 standards, and the BS OHSAS 18001 system for occupational safety and health management.