Annual reports (in German)
- 2010 Annual Report
- 2009 Annual Report
- 2008 Annual Report
- 2007 Annual Report
- 2006 Annual Report
- 2005 Annual Report
- 2004 Annual Report
- 2003 Annual Report
- 2002 Annual Report
- 2001 Annual Report
- 2000 Annual Report
- 1998 Annual Report
- 1997 Annual Report
Brochures
DVD
«Water is Life» (Preview on youtube)