American Water, the largest water utility in US, is targeted by a cyberattack

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The largest regulated water and wastewater utility company in the United States announced Monday that it was the victim of a cyberattack, prompting the firm to pause billing to customers.

New Jersey-based American Water — which provides services to more than 14 million people in 14 states and on 18 military installations — said it became aware of the unauthorized activity on Thursday and immediately took protective steps, including shutting down certain systems. The company does not believe its facilities or operations were impacted by the attack and said staffers were working “around the clock” to investigate the nature and scope of the attack.

The company said it has notified law enforcement and is cooperating with them. It also said customers will not face late charges while its systems are unavailable.

According to its website, American Water manages more than 500 water and wastewater systems in about 1,700 communities in California, Georgia, Hawaii, Illinois, Indiana, Iowa, Kentucky, Maryland, Missouri, New Jersey, Pennsylvania, Tennessee, Virginia and West Virginia.