A great deal changed after the terror attacks of September 11, 2001 – including the presumption that our water and sewer systems are safe against attack and sabotage. The American Water Works Association (AWWA) has now published a book, Security and Emergency Planning for Water and Wastewater Utilities, designed to help utilities fend off threats and respond to emergencies. Since September 11, governments at all levels have passed new laws and regulations to help protect water infrastructure against intentional damage and prevent the deliberate contamination of water supplies. Utilities everywhere assessed vulnerabilities, revised procedures to improve response to emergencies, and
