About 30,000 people live in Suisun City, roughly 55 miles north of San Francisco. Water system attacks under investigationSeparately, federal agencies are investigating cyberattacks involving municipal water systems across the country. Straight Arrow previously reported that suspected Iran-linked cyberattacks affected more than 30 water systems in Minnesota before reports expanded to at least 12 states. Why small systems are vulnerableSmaller water utilities often rely on internet-connected automated equipment to operate and monitor their systems. The measure would require water utilities to assess cyber risks and fix significant vulnerabilities.