The Passaic Valley Water Commission says that water service has been restored following a 30-inch water main break near Paterson Great Falls on Aug. 8.

But despite the restoration, a boil water advisory remains in effect for some areas.

“Operating pressures began rising almost immediately, and portions of Paterson and Prospect Park are returning to normal. The Manchester Utilities Authority (MUA), which operates the Haledon and North Haledon water systems, also confirmed [Sunday] that those towns are now experiencing normal operating pressures,” Passaic Valley Water Commission officials wrote in a statement.

Thousands of people remain impacted by the boil water advisory. Those impacted include some Paterson residents and customers served by Manchester Utilities Authority in North Haledon and Haledon.

“Residents and businesses still under the advisory should boil water for at least one minute before using it for drinking, cooking, brushing teeth, washing dishes, or making ice—or use bottled water—until notified that the water is safe,” officials wrote.

Officials say that the boil water advisory will remain in effect until tests show that it is safe for consumption. While those tests are being conducted, officials have issued a safety warning to residents.

“PVWC’s water quality testing crews wear official uniforms and carry photo ID badges. Do not open your door to anyone without proper credentials. If someone claims to be conducting water quality tests but cannot show ID, do not let them in and immediately contact your local police department,” they wrote.

Haledon and North Haledon residents who have questions about the water issues can visit the Manchester Utilities Authority website or call 973-942-9027.

The 140-year-old water main broke on Aug. 8, disrupting service for more than 200,000 people.