(Portland, OR)  --  Bottled water is now being made available at Portland public schools, after water-quality testing at two schools in March showed elevated levels of lead in 14 of 92 water sources.  School district officials say some of the lead levels recorded were two to three times higher than the district's maximum standard of 15 parts per billion.  District Superintendent Carole Smith says she'll ask for an outside investigator to review the district's handling of the situation.  Smith says students and staff at all district schools will drink bottled water for the rest of the school year, and says comprehensive lead tests will be conducted during the summer.