Data Breach May Have Affected Some Rochester YMCA Accounts. Donors of the Rochester YMCA have been notified of a data breach that may have affected their personal information. Rochester, MN (KROC AM News) - D onors of the Rochester YMCA have been notified of a data breach that may have affected their personal information. The alert was sent by YMCA of the North, the Twin Cities organization the Rochester Y is a member of.