About DHI

DHI A/S is an independent, international consulting and research organisation established in Denmark and today represented in all regions of the world.

Our objectives are to advance technological development, governance and competence in the fields of water, environment and health. We provide a wide range of solutions within consultancy, policy services and leading edge technologies. DHI A/S works with governmental agencies and authorities, contractors, consultants and numerous industries. We are approximately 1,100 employees working worldwide and on all continents.

DHI Ballast Water Center:

DHI Ballast Water Centre provides biological performance verification of ballast water management systems according to the requirements by the International Maritime Organization (IMO) and the United States Coast Guard. The IMO flag state or the US authorities are represented by classification societies and independent laboratories accepted to perform tests and inspections of specific equipment. DHI performs type approval testing of ballast water management systems in collaboration with three classification societies and independent laboratories, which include DNV GL, Lloyd’s Register and Korean Register.

DHI A/S is the sole provider of biological performance tests of ballast water management systems conducted with an ISO 17025 accreditation. 

Furthermore, DHI A/S works in accordance with the quality management system standard, ISO 9001.

The certificate covers the following products or services within the area of water, environment, and health:

  • consulting
  • software
  • research & development
  • laboratory testing, analysis and products

For more information: