"Angry" residents in Bedfordshire have had to queue for 45 minutes for bottled water after enduring a second night without mains supplies.
Since the water cut out on Friday evening, local supplier Anglian Water says it has restored supplies to "many customers", but "some customers in Leighton Linslade, Pottsgrove, Milton Bryan and Southcott are still without water".
Maria Power had to queue for 45 minutes at the Tesco on Vimy Road in Leighton Buzzard, where Anglian Water is offering free bottled water to those still affected.
"There was probably 50 people in front of me, and it continued growing behind me," the 34-year-old told the PA news agency.
"The situation is disgraceful it should have been resolved by now."
— Maria Power (@MizzyBubbles) December 15, 2019
Local resident Dave, 39, told PA: "As I passed (the water queue) two friends drove by and called out 'we're off to Milton Keynes for a shower'. It is shocking.
"'Love Every Drop' is Anglian Water's slogan, but my cat had the last remaining water I had, that was what was left in the kettle."
Anglian Water has apologised for the fault, which they say was initially caused by a broken valve and then by "air trapped in the pipes".
"Apologies don't quite justify the time scale," Ms Power said.
"I'm angry at the water company that they are going to leave people without water for nearly 48 hours."
The supplier said on Sunday this problem would be solved "later on this afternoon".
It earlier said the issue, affecting an area home to an estimated 40,000 people, would be resolved by midday on Saturday.
"Anglian Water has been moving the estimates throughout the weekend," added Dave.
Here are the tankers heading out to Leighton Linslade today to pump water into the mains as part of our efforts to get everyone back on water as soon as we can pic.twitter.com/A9J94UdZTi
— Anglian Water (@AnglianWater) December 15, 2019
Some residents later complained on Twitter that bottled water later ran out at the Tesco store.
However, MP Andrew Selous said queues have "dropped down and everyone got their allocation".
LB water update2 of 2. Tankers now injecting into various parts of the west. Rest of area holding up well. A 5pm restoration still on. Many customers supportive given what a complex issue Anglian Water dealing with.
— Andrew Selous MP (@AndrewSelous) December 15, 2019
"Tankers now injecting into various parts of the west," Mr Selous tweeted. "Rest of area holding up well. A 5pm restoration still on.
"Many customers supportive given what a complex issue Anglian Water dealing with."
Ms Power, a nurse, added that she is concerned about vulnerable people such as the elderly and babies.
Anglian Water has offered to hand-deliver bottled water to vulnerable customers on their WaterCare register, though some residents have said they were unaware of it.
"Otherwise we would have signed up as a relative has just been released from hospital and needs to take in a large amount of fluids," Richard Ayre, 29, said.
Jennie Bradley, who has a three-month-old baby, said water returned to her home on Sunday only to cause a "severe" leak, meaning she had to switch it off again as she awaited a plumber.
The problems are also causing leaks. We are currently waiting for an emergency plumber to come to help after we got water supply back around 8am ... but along with that came a severe leak through our dining room ceiling from our bathroom!
— Jennie Bradley (@jennierbradley) December 15, 2019
"Anglian Water do charge a pretty penny for a poor service," the 38-year-old told PA.
"My question to them is why does one single valve in just one pipe cause an outage to the whole of a huge town and surrounding villages?"
Anglian Water said in a statement: "We are really sorry customers in Leighton Linslade are still without water.
"We know it's been incredibly frustrating for our customers that timescales have changed over the last two days and not all supplies have been restored at the same time.
"Our estimates are always given with the best of intentions for returning things to normal, but on this occasion, it has proved an unusually complex issue to resolve, with challenges that could not be predicted emerging along the way."