A discharge of about 17,000 gallons began at just before 3 p.m. on Thursday.
Utility crews responded immediately and stopped the overflow at just before midnight.
DPW says that the sanitary sewerage discharge was caused by a broken sewer main.
Crews located the break and were able to halt the flow just before midnight.
Some of the discharge reportedly flowed to a tributary of Herring Run.
Residents can check and water-related advisories here.