by Tom MacDonald for NewsWorks
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City Council is reviewing why Philadelphia doesn't collect all the taxes it's owed.
Council members are taking an even closer look at taxes that could help the struggling public schools.
A report from the Pew Trust's Philadelphia Research Initiative says the city and School District are owed more than a half-billion dollars in delinquent taxes when interest and penalties are factored in, but only about 30 percent of it is collectable, for one reason or another.