NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AAA' rating on the following Cobb County-Marietta Water Authority, Georgia's (the authority) bonds: --$44.6 million water revenue refunding bonds, series 2015. In addition, Fitch affirms the following ratings: --$33.9 million water revenue bonds, series 2009. The Rating Outlook is Stable. SECURITY The bonds are secured by a first lien on and pledge of net revenues of the water system (the system). KEY RATING DRIVERS EXCEPTIONAL FINANCIAL