What we know about the alleged Iranian hacks on US water utilities

Since the end of last month, several water utilities in the United States have been hit by cyberattacks, causing alarm in the country. 

For years, water utilities and other critical infrastructure facilities in the power sector, for example, have been targeted by hackers, whether government-backed or individuals. What makes this recent series of attacks—allegedly carried out by Iran—particularly concerning was how widespread they have been, hitting targets in around a dozen states.