Scope of Hacks on U.S. Water Supply Widens as Evidence Points to Iran

The scope of cyberattacks on U.S. water systems has grown to include at least seven states and may be far wider, officials and experts warned, as the authorities raced to safeguard the nation’s water supply against an assault that increasingly appeared to be the work of Iran.

While there were no indications that any water supply had been altered or made unsafe to drink, state and local officials throughout the country were on high alert for potential problems in vulnerable computers that are commonly used to monitor and adjust water quality, including chemical-treatment levels and water pressure. Minnesota first publicly reported the attacks, and now Michigan says its systems have also been targeted.

The attack has little precedent, experts said, but has long been the stuff of nightmares and sensationalized Hollywood thrillers: an apparent cyberattack by a foreign power during a time of war that could, at least in theory, jeopardize the health and safety of Americans.

Officials cautioned that they had not definitively determined that Iran was responsible for the attack and that the investigation was still preliminary. But they said Iran had stepped up cyberattacks since the U.S. and Israel launched a war against the country five months ago, and had previously targeted similar water systems and other critical infrastructure in the U.S. There seemed no financial motive, making a criminal attack less likely.

Despite growing concerns, President Trump sought to downplay the matter on Friday by blaming Minnesota — which was early to spot and report the recent surge in malicious hacking activity, helping to prompt other states to probe their own water systems — for suffering intrusions his own intelligence agencies believe were highly likely carried out by Iran, officials familiar with the assessment said.

“I think Minnesota is behind it,” Mr. Trump said on Friday in response to a reporter’s question about Iran’s possible involvement, which The New York Times earlier reported. “I don’t think there was an Iranian cyberattack.” (The New York Times)