Boil water advisory lifted for nearly 100,000 Pennsylvania American Water customers

A boil-water advisory affecting nearly 100,000 Pennsylvania American Water customers in Washington and Allegheny counties was lifted Monday after a second round of water tests collected Feb. 7 and Feb. 8 tested negative for bacterial contamination.

A boil-water advisory that affected nearly 100,000 Pennsylvania American Water customers in Washington and Allegheny counties was lifted on Monday after a second set of tests came back negative. The company said acceptable results were obtained from samples collected on Feb. 7 and Feb. 8. Government regulations require two negative tests before an advisory can be ended. The advisory followed a water main break and a power surge that reduced tank pressure near the Aldrich Water Treatment plant. Known details: - The advisory covered nearly 100,000 customers in Washington and Allegheny counties. - Pennsylvania American Water said samples collected on Feb. 7 and Feb. 8 produced acceptable test results and that "the issue has been resolved." - Regulations required a second negative test result before the advisory could be lifted. - A water main break in Elrama, Washington County, on Friday night contributed to the advisory. - Pennsylvania American Water reported a power surge that depleted storage at a tank near the Aldrich Water Treatment plant and said a loss of pressure could allow contamination through backflow or back siphonage. - The Elrama Volunteer Fire Company reported a 48-inch water main break around 11:30 p.m. on Friday in front of their station; a Pennsylvania American Water spokesperson confirmed the break was related to the advisory. Summary: Pennsylvania American Water announced the advisory was lifted after two rounds of negative bacterial test results and stated the issue has been resolved. Undetermined at this time.