Cyber Risk in U.S. Water Systems: A Municipal Credit Perspective

Recent cyberattacks on water utilities in at least 12 states, though causing limited disruption, signal a broader warning about critical infrastructure vulnerabilities. These incidents, suspected to be retaliatory rather than ransomware, underscore the need for operational resilience.

While smaller municipal systems face budget constraints, the costs of cybersecurity defenses may increase rates. However, failing to prepare creates greater risk of sustained disruptions. New federal reporting rules and state funding initiatives offer some relief, but we continue to assess cyber risk through sector exposure and issuer-specific preparedness.

We evaluate preparedness across management awareness, technical controls, response governance, cyber insurance, and AI readiness. Ultimately, cyber risk becomes credit risk when an issuer lacks the capacity to absorb an attack without impacting essential services or bondholders.