OMA said ransomware affected two employee computers July 15, but access was restored that morning and it found no evidence that data or client records were compromised.
The utility switched to manual control after attackers gained remote access July 27; officials said water service, water quality and customer data were unaffected.
Davison County workers were warned not to open city emails, while Mitchell’s mayor said there was no indication the city’s email environment was affected.
The county is restoring affected systems after a technology disruption while officials investigate the cause and emergency services remain operational.
The incident disrupted phone communications with the borough’s water system and forced employees to reactivate it manually, but officials said water service continued and drinking water remained safe.
Officials said the July 27 incident disrupted parts of the water system’s computer network but did not affect drinking water safety or service, and no customer data was compromised.
A programmable logic controller in the utility’s automated control system was targeted July 27, but manual operations kept water service running and the utility said the public supply was never in danger.
Technology systems remain unavailable across the Fort Worth health network, forcing manual procedures and delaying records responses as the cause remains undisclosed.
County officials said all government systems were offline Thursday, while 911 remained operational and the circuit court clerk reported its phone lines were down.
