Houses and businesses in Bamber Bridge have been hit by water problems.
Residents have reported water coming out of their taps slower or not at all.
United Utilities said scheduled work in the Woodfield area of the town had caused unexpected problems.
A spokesman said: “We notified residents that work was being carried out in the area and to expect a period without water, but it seems that a few more properties than we expected have been affected.
“It’s not a major problem, probably an extra road, but we are working to fix it as soon as possible, and don’t expect water to be off later than 1pm.”