Severn Trent Water are continuing to supply residents in Tenbury Wells with bottled water after the company told people not to drink their water supply.
A water pipe has burst in the area and the company says a very small amount of floodwater may have gone back into the pipe.
The repair to that pipe has now been completed.
It is likely to be Monday morning before all is back to normal.
Severn Trent has apologised for the inconvenience.
People who live in and around Tenbury Wells on the Shropshire/Worcestershire border are being told to avoid drinking water from their taps amid contamination concerns.
Teams of volunteers are handing out free bottled water in a major operation at two locations in the town; the hospital and the swimming pool.
Engineers are working to trace the source of the problem, but it's likely to be Monday morning before all is back to normal.
Severn Trent say water can still be used for bathing and flushing the toilet, but to take care when bathing young children in case they accidentally drink the bath water.
They say, "We had a burst pipe in the area and we believe a very small amount of floodwater may have gone back into the pipe."
Some homes are without supplies, others have an intermittent supply.
Four men have been arrested after police say they discovered a "subterranean cannabis factory".
The raid at a factory near Tenbury Wells in Worcestershire was carried out last Friday (July 13) following a joint operation run by West Mercia, Gloucestershire and Gwent police forces.
They found more than 200 plants, with a street value of £100,000.
Those arrested were a 32-year-old man from Herefordshire; a 58-year-old man from Gwent and men aged 35 and 22 from Gloucester, who were all held on suspicion of conspiracy to produce cannabis.
All four have been bailed until September pending further inquiries.