This thoughtful book provides a much-needed look at the vulnerabilities and security of our nation's water sources. Written as a result of 9/11 and in response to the critical needs of water/wastewater plant managers, plant engineers, design engineers, and utility managers, it addresses the need to incorporate security upgrades in existing facility systems and careful planning in all new construction sites. Each chapter provides professional guidance on designing, operating, maintaining, and mitigating threats to water/wastewater systems, including both treatment/distribution and treatment/collection systems, to ensure state-of-the-art security. The author covers all aspects of monitoring, response, critical infrastructure redundancy, and recovery and provides other strategic information, including methodologies for vulnerability assessments, specialized remote monitoring equipment, and U.S. EPA's security toolbox items. No matter what your background, if you are responsible for protecting a water source, your facility stands to gain from the principles described in this book.