S&P Global Ratings has assigned its 'A' rating to the City of Philadelphia's gas works revenue bonds, 15th series, issued under its 1998 ordinance. At the same time, S&P Global Ratings affirmed its rating on parity debt outstanding. The outlook is stable. S&P Global Ratings has also affirmed its rating on the following issues rated under our joint support criteria (low correlation): Its 'AA+/A-1+' ratings on the 1998 ordinance, 8th series D bonds, jointly supported by a letter of credit from Royal Bank of Canada; Its 'AA+/A-1+' ratings on the 1998 ordinance, 8th series B bonds, jointly supported by a letter of credit from Wells Fargo Bank N.A.; and Its 'AA/A-2' ratings on the 1998 ordinance, 8th series C bonds,