SAN FRANCISCO (Standard&Poor's) April 16, 2012--Standard&Poor's Ratings Services raised its senior lien rating and underlying rating to 'AA+' from 'AA' and its subordinate lien rating to 'AA' from 'AA-' on Los Angeles, Calif.'s outstanding wastewater revenue bonds. In addition, we assigned our 'AA+' rating to the wastewater system's series $198 million 2012A senior lien and up to $162 million 2012B senior lien revenue bonds and our 'AA' rating to the system's $95 million series 2012A subordinate lien bonds, $80 million 2012B subordinate lien bonds, and up to $494 million 2012C subordinate lien bonds. We also affirmed our 'AAA/A-1' ratings on various outstanding variable rate bonds that reflect the application of our joint rating criteria. The outlook,