The Philadelphia School District has found unsafe levels of lead in about 20 percent of the nearly 14,000 water outlets sampled in the district's older school buildings, officials said.

The school district has shut off 594 drinking faucets and water coolers after the high lead levels were found in the 298 older buildings, all but one of which has now been tested, district officials told a City Council panel Nov. 20. Many water outlets that tested high for lead


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