Our goal is to find practically-oriented, reliable and viable solutions to our customers’ questions. We are committed to improve continuously our processes and services for the satisfaction of our customers.

WESSLING ensures quality management

Securing our high quality requirements:

  • Our testing and services consistently provide quality which corresponds to regulatory requirements and customer demands.
  • Continuous compliance with NF EN ISO/IEC 17025 ensures high-quality testing and leads to constant improvements to the effectiveness of the quality management system.
  • We ensure that all our employees are skilled and qualified in the services they provide. All of our employees are familiar with the quality assurance documentation and implement the guidelines and procedures in their work.
  • Compliance with all legal and further quality requirements form the foundation of the work carried out in our company.



Our laboratories in Lyon, Paris and Lille are accredited in accordance with NF EN ISO/IEC 17025. This accreditation standard comprises all quality aspects for testing laboratories, The accreditation of our laboratories is monitored regularly. As an accredited laboratory, we also participate in all of the relevant audit programmes in order to secure our technical expertise.

Our accreditation is further proof of the commitment of WESSLING to excellence and leadership in this sector.

You can download our accreditation certificate and the scope of our accreditation listed in the certificate annex on this page (French versions).

Europe-wide accreditation validity

The EA (European Accreditation) is an association of national accreditation bodies in Europe which are officially recognised by their national governments. They evaluate and verify the international standards of organisations which perform evaluation services such as certification, auditing, inspections, checks and calibration.

Membership of the COFRAC in the EA means that our accreditation is recognised on a European level. This recognition on a European level reinforces our customers’ confidence in the competence, independence and impartiality of our tests.

International accreditation validity

COFRAC membership of the International Laboratory Accreditation Cooperation (ILAC) means that our accreditation is internationally recognised. A list of countries which are members of the ILAC and therefore mutually recognise the accreditation of member countries is available under: http://ilac.org/


Our labs are notified for testing from the french Ministry for environment and health.

The certification for WESSLING France in Lyon can be consulted under : http://www.labeau.ecologie.gouv.fr/index.php/laboratoires_agrees 

The certification for WESSLING France in Paris can be consulted under : https://solidarites-sante.gouv.fr/sante-et-environnement/eaux/article/laboratoires-agrees-pour-le-controle-sanitaire-des-eaux

Certification, approval and recognition

Our integrated QSHE management system is certified in accordance with the applicable standards, thereby combining quality assurance (Q), safety (S), health (H) and environment (E). You can download the certificates of our certifications, approvals und recognitions on this page (French version).

Your contact to quality management

We will be happy to support you.