A boil water advisory is in effect for customers on Carr Hill Road, east of Terrace Lake Road and customers on Terrace Lake Road, north of Carr Hill Road.
All customers in Suburban Court also were affected, Southwestern Bartholomew Water Corp. officials said.
Water service for the customers was disrupted Friday after contractors cut a water line on Terrace Lake Road, the water company said.
Water service was restored at 1:15 p.m., but the boil water advisory will continue for the customers until noon Thursday.
As a precaution, customers should bring water to a full boil for five minutes before consumption or use in cooking or food preparation.
On Monday, the water to the customers affected by the Friday outage will be off from 1 to 3 p.m. for water main work in the area.