Introduction -- A message to you -- Our intended message -- How to benefit from reading this book -- Some perspectives on accidents and human error -- Case studies of waterborne disease outbreaks -- Milwaukee, Wisconsin, U.S.A. 1993 -- Freuchie, Fife, Scotland. 1995 -- Nokia, Finland 2007 -- Adliswil, Canton of Zurich, Switzerland 2008 -- Alamosa, Colorado, U.S.A. 2008 -- Northampton, Northamptonshire, England. 2008 -- Östersund, Sweden. 2010, 2011 -- Detailed case studies of waterborne disease outbreaks -- Walkerton, Ontario, Canada. 2000 -- North Battleford, Saskatchewan, Canada. 2001 -- Case studies of severe chemical contamination -- Camelford, Cornwall, England. 1988 -- Fluoride overdose case studies, U.S.A. 1977, 1980, 1992, 1993 -- Burncrooks, Stirlingshire, Scotland. 1997, 2011 -- Case studies of close calls -- Stratford, Ontario, canada 2005 -- Brisbane, Queensland, Australia 2009 -- Anytown, North America. 2011 -- Anytown1&2, Australia. 2011 -- Conclusions -- Summary of cases and those not covered -- Recurring themes and lessons -- A preventive risk management mindset -- drinking water safety plans -- Commandments for assuring safe drinking water -- Appendix A: Summary timelines for case studies -- Appendix B: Conversion chart.