CHICAGO (Standard&Poor's) March 20, 2015--Standard&Poor's Ratings Services said that it revised the outlook on the following ratings to positive from stable and affirmed them: The 'A' long-term rating and underlying rating (SPUR) on Philadelphia's existing water and wastewater revenue debt; and The 'AAA/A-1+' rating on the city's series 1997B bonds, which are jointly secured by the city and the letter of credit (LOC) provider TD Bank N.A. At the same time, we assigned our 'A' long-term rating to Philadelphia's series 2015A and B water and wastewater revenue refunding bonds. "The positive outlook reflects our opinion that there is at least a one-in-three chance that the rating could improve from its current level within the next two
