Contact
You can contact us by phone or by completing the contact form. If you have a specific question or if you would like us to carry out a study or research, please try to formulate your question as precisely as possible. This will ensure that your query is forwarded to the most qualified expert.
More information
General address Deltares
P.O. Box 177
2600 MH Delft
The Netherlands
Visiting address
Boussinesqweg 1
2629 HV Delft
tel: +31 (0)88 335 8273 (office hours 08:30 and 17:00)
Press information
Journalists can call us on our special number for the press +31 (0) 88 335 7733. The the Communications Department will arrange for the appropriate spokesperson to speak to you.
Complaints
Deltares deals transparently and carefully with the use of government money and the research we conduct. The knowledge we gain in this way is public. We take any complaints seriously. For example about cooperation with the business community or a general complaint. If that is the case, send us an e-mail stating the complaint, your name, organisation and telephone number. We will contact you as soon as possible.