Residents in Tenbury Wells in Worcestershire should know this afternoon if they can start drinking their tap water again.
Test results are expected following a contamination alert on Saturday.
Free bottled water is on offer again in the town centre from 7am this morning.
Householders on the Shropshire/Worcestershire border will have to wait at least another 24 hours before the all-clear can be issued on their drinking water.
Residents in more than 2,000 properties in and around Tenbury Wells have been told not to drink water from their taps amid a contamination alert.
There was a burst pipe on farmland in the Clee Hill area and it is feared soil could have entered the domestic supply.
Toxicology tests are continuing but the results are not expected until tomorrow afternoon at the earliest.
Severn Trent Water will continue to hand out free bottles of water between 7am and 10pm in car parks at the swimming pool and local hospital.
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.
GMB, the union for water workers, is calling on Severn Trent water to be investigated following claims that 500 job cuts have led to leakages and depleted stocks.
They estimate water usage went up by 20% in the last year and claim that job losses and the introduction of a number of cost saving initiatives are behind a 'failure' to control leakages.
But Severn Trent Water, whose headquarters are in Coventry, says job losses have not affected the number of front-line staff and add that teams aim to fix leaks within 24 hours.
Residents in Telford who complained about a fishy smell coming from their drains have been told it was caused by dead piranhas, which had likely been flushed down the toilet.
Severn Trent Water says, when it investigated the sewers in Madeley, it also found a number of other dead fish.
It is not the first time sewers in Shropshire have been blocked by odd items - in January sewers in Ditton Priors, near Bridgnorth, were found to be blocked by piles of pants that had been flushed down the toilet.
Sue Fulford, customer operations manager for Severn Trent Water said: "The drains that take waste water away from your home are only a few inches wide and are only meant to take water, toilet roll and human waste.
"Toilet roll is meant to break down when it gets wet so it washes easily through the system."
Severn Trent have said the rain and storms over the last few days have led to an increase in calls form customers.
Extra staff are working at the firm's call centres and additional teams are being used on the ground to deal with flooding issues.
The company supplies water to more than four million households across the Midlands.
The water supply to thousands of homes across Birmingham is "slowly being restored" to normal following a major water mains burst, Severn Trent Water have said.
The firm has urged people to stay patient as it may still take time for the network to fill back up.
A spokesperson also warned people their water might be slightly yellow or orange - but said there was no imminent risk to health and it should return to normal if left running for a few minutes.
Supermarket shelves are being emptied of bottled water as homes in Birmingham have been left with little or no supply since this morning.
Thousands of homes in the city have been hit by supply issues after a water main burst earlier today.
Severn Trent Water has said it is moving water around the network and bringing in a fleet of tankers to try to restore water supply as soon as possible.
They hope to get 2,900 homes in Great Barr back up and running within a couple of hours, along with 1,500 homes in Northfield.
A further 2,700 houses in the Bartley Green and Woodgate areas and 600 in Selly Oak have also been affected.