ABC7 has been unable to get a comment from facility officials on Friday night.
In all, there are three confirmed cases of the bacterial disease and seven probable cases at the facility.
The Lake County health department says it appears to be contained at that one location.
Health officials are working to identify a source.
Legionnaires' disease is a severe form of pneumonia. It is not transmitted person to person. But can be contracted by inhaling contaminated mist or vapor.
Read more in Saturday's Daily Herald.
