The pipe broke at the intersection of Bloomfield and Clifton avenues in Newark's North Ward around 4:45 a.m.
Several nearby streets were also closed while workers made repairs.
Newark officials advised residents that their water is safe to drink and use.
"Our Division of Water and Sewer Utilities team is working around the clock to repair this broken water main and re-open these key roads to traffic," Mayor Luis Quintana said. "I urge motorists to allow extra time for travel in the snow and to use alternate routes. For our families who are being impacted by low water pressure as a result of this water main break, we ask them to be patient."
The Newark Police Department dispatched units to the area of 163 Bloomfield Avenue and began diverting traffic away from the area due to minor flooding. Several streets remain closed as the Division of Water and Sewer Utilities and Department of Engineering are working to remedy the water main break.
As Bloomfield Avenue is an Essex County highway, it comes under jurisdiction of both city and county agencies. Essex County Sheriff barricades have now been set up on both streets to re-route traffic. Their officers are working to divert traffic. City health officials are also advising residents that the water is safe to drink and use.
For more information on any City of Newark program or policy, contact the Non-Emergency Call Center at (973) 733-4311.