NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned the following ratings to the District of Columbia Water and Sewer Authority's (DC Water) obligations: --Approximately $100 million public utility subordinate lien revenue bonds, series 2015A (Green Bonds), 'AA-'; --Approximately $250 million public utility subordinate lien revenue bonds, series 2015B, 'AA-'; --Extendable Municipal Commercial Paper (EMCP) notes, series A (not to exceed $100 million), F1+. The series 2015A and 2015B bonds are