California Water and Wastewater System

The California Water and Wastewater System provides essential water treatment and distribution services to communities across the state of California. It operates facilities that draw raw water from local sources, treat it to meet drinking‑water standards, and deliver it to residential, commercial, and industrial customers. In addition to potable water, the organization manages the collection, treatment, and discharge of wastewater, ensuring that sewage is processed before being returned to the environment. These functions are critical to public health, supporting daily life and economic activity throughout its service area. As part of the nation’s water infrastructure, the system is subject to oversight by federal and state agencies that set quality and safety standards. Its operations rely on a combination of physical assets, such as pumps, pipelines, and treatment basins, and digital control systems that monitor and regulate processes in real time. The organization’s service scope is defined by the geographic boundaries of the municipalities and districts it serves, though specific population figures are not disclosed in the available sources. By maintaining continuous operation of its treatment plants and distribution networks, it helps prevent water shortages and contamination risks. The reliability of its services is a key factor in the resilience of the communities that depend on it.

The California Water and Wastewater System is distinguished by its specialization in both drinking‑water and wastewater management, placing it at the intersection of environmental protection and public safety. Its operational technology infrastructure includes supervisory control and data acquisition (SCADA) systems, programmable logic controllers, and other industrial control devices that automate treatment processes. This reliance on interconnected digital systems makes the organization a target for cyber threats, as demonstrated by the August 2021 incident in which threat actors used spearphishing, exploited outdated infrastructure, and leveraged insecure remote access to compromise both information technology and operational technology networks. The attack involved ransomware deployment and insider threats, highlighting vulnerabilities such as insufficient network segmentation and unpatched control‑system equipment. The incident underscored the sector‑wide challenge of safeguarding critical infrastructure against evolving adversary tactics while maintaining uninterrupted service. Because the organization’s headquarters is located in the United States, it operates under U.S. legal and regulatory frameworks that govern critical‑infrastructure cybersecurity. Its role as a provider of essential water services necessitates a balance between operational efficiency and robust security measures to protect both data and physical processes. The lessons learned from the 2021 event continue to inform efforts to improve resilience across similar water and wastewater entities nationwide.