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US Water Facilities Targeted by Cyber-Attackers

WireByte Staff · August 4, 2026

The US Cybersecurity and Infrastructure Security Agency (CISA) has warned of a coordinated cyber-attack on at least seven US states' water and wastewater facilities, with 30 Minnesota water systems hit, leading to disruptions in water supply. The agency suspects Iran is behind the attack, which has been ongoing since the US-Iran war began. The FBI has opened an investigation, but no drinking water contamination has been reported.

Key points

  • The US Cybersecurity and Infrastructure Security Agency (CISA) issued a warning about a coordinated cyber-attack on US water facilities in at least seven states.
  • 30 Minnesota water systems were hit by cyber-attacks, leading to disruptions in water supply, including low-pressure water flow and boil-water notices.
  • The suspected culprit is Iran, according to officials, who have stepped up cyber-attacks on the US since the war began nearly six months ago.
  • The FBI has opened an investigation into the hack, but no drinking water contamination has been reported.
  • CISA advised utilities to take their systems offline and switch to manual mode to mitigate continued disturbances.

Cyber-Attack on US Water Facilities Raises Concerns

The US Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning about a coordinated cyber-attack on at least seven US states' water and wastewater facilities. The attack, which has been ongoing since the US-Iran war began, has resulted in disruptions to water supply in Minnesota, where 30 water systems were hit.

While no drinking water contamination has been reported, the attack has raised concerns about the vulnerability of critical infrastructure systems to cyber-attacks. CISA has advised utilities to take their systems offline and switch to manual mode to mitigate continued disturbances.

The suspected culprit behind the attack is Iran, according to officials, who have stepped up cyber-attacks on the US since the war began nearly six months ago. The FBI has opened an investigation into the hack, but the full extent of the damage is still unknown.

Sources

WireByte Staff — Editorial Team

The WireByte editorial team synthesises technology news from multiple primary sources, verifies the facts, and links every source. Articles are produced with AI assistance and reviewed under our editorial policy.