The compiling of this course was preceded by a long history of involvement of many people, which also parallels the history of the drinking water education program at TU Delft. The experiences and perspectives of the Dutch drinking water sector have been extensively used for the preparation of this course. VEWIN, Kiwa and the Dutch drinking water companies have generously provided pictures and other illustrative materials. Material from DHV-projects has also been used.

In particular, we would like to thank the following companies and persons for their enthusiastic cooperation and readiness to make photographic illustrations available:

• Waterbedrijf Groningen,
• Waterleidingmaatschappij Drenthe,
• Vitens, 
• PWN Waterleidingbedrijf Noord-Holland,
• Waternet (Amsterdam Water),
• Duinwaterbedrijf Zuid-Holland,
• Oasen, Evides,
• Brabant Water,
• Waterleiding Maatschappij Limburg,
• VEWIN,
• Kiwa, DHV,
• Dennis Bergkamp,
• Adele Sanders.