GM said it is working closely with water treatment experts and local health authorities to investigate these potential factors to prevent future issues

GM confirmed that the strains of Legionella found at Cole do not match those of the employees who previously tested positive.

General Motors plans to reopen its Cole Engineering Center on Oct. 1 after detecting and clearing Legionella bacteria in the facility.

The Detroit automaker closed the building on its Warren campus on the evening of Sept. 10 after two employees tested positive for Legionnaires' disease, a type of pneumonia.

As was first reported by the Detroit Free Press , the roughly 11,000 employees who work in the Cole building were told to work from home or another location.

Notably, no traces of the bacteria were found in

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