Cyber-Physical Risk Assessment for U.S. Water Utilities: A Comprehensive Analysis of SCADA and Operational Technology Vulnerabilities

The increasing digitization of water infrastructure has transformed traditional operational technology (OT) systems into complex cyber-physical environments, exposing critical water utilities to unprecedented cybersecurity risks. This research presents a comprehensive risk assessment of cyber-physical threats targeting U.S. water utilities, with particular emphasis on Supervisory Control and Data Acquisition (SCADA) systems. The study employed a systematic literature review methodology, analyzing 25 peer-reviewed academic sources published between 2013-2025, supplemented by incident analysis and vulnerability assessment frameworks. The research examined multiple dimensions of cyber-physical risks including attack vectors, system vulnerabilities, regulatory compliance challenges, and mitigation strategies across diverse water utility environments. Key findings reveal that water utilities face a complex threat landscape characterized by sophisticated attack methodologies targeting both legacy and modernized infrastructure. The analysis identified critical vulnerabilities in human-machine interfaces, inadequate network segmentation, insufficient authentication protocols, and limited cybersecurity workforce capabilities. Notable incidents, including the Oldsmar water treatment facility attack and various ransomware incidents, demonstrate the real-world implications of these vulnerabilities. The study found that smaller water utilities are disproportionately vulnerable due to resource constraints and limited cybersecurity expertise. Furthermore, the integration of Internet of Things (IoT) devices and cloud-based management systems has expanded the attack surface while creating new interdependencies between IT and OT environments. The research contributes to the cybersecurity knowledge base by providing a comprehensive taxonomy of cyber-physical risks specific to water utilities and proposing a multi-layered risk assessment framework that addresses both technical and organizational vulnerabilities. Recommendations include enhanced regulatory frameworks, increased federal funding for cybersecurity improvements, mandatory cybersecurity training programs, and the development of sector-specific threat intelligence sharing mechanisms to strengthen the overall resilience of America’s water infrastructure.