Around 100 households in Plaistow had their water supply cut off after a mains pipe burst.
Residents of Baritone, Bass, Alto and Soprano Courts, between Church Street and Plaistow Grove, have been affected by the water outage since just after 1pm on Monday (January 9).
Housing association L&Q apologised and said water has now been restored to "the majority" of residents, while those remaining have been offered temporary accomodation in a hotel.
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A resident, who has been offered hotel accomodation and who did not wish to be named, said: "It's dreadful. You [couldn't] flush the toilets... wash anything... shower... do any washing up."
He claimed L&Q said it could provide each household with six 1.5 litre bottles of water.
He said: "The toilet takes 10 litres of water for it to flush through properly. That's your six bottles gone..."
Three residents said that L&Q provided them with bottled water at around 2pm on Tuesday, more than 24 hours after the main supply had been stopped.
Single mother Glenda Charlery, who lives in Bass Court with her children aged 10, 7 and 4, said the water outage felt like a "crisis".
Glenda said: "I've had major surgery, I've had a stoma put in place.... I [was] expected to function with three children, no water and my health condition...
"In the middle of having a crisis because of the stress and anxiety, I dropped my kids to school late because I was trying to wash them with a bottle of water."
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Glenda said that a standpipe had been put in place on Tuesday a few roads away for the residents to collect water in order to flush their toilets.
She continued: "I was made to carry water so I could flush the toilet, even though I explained my health conditions... that because of all the operations I'm not supposed to carry or lift anything heavy...
"I had to find one of my kids' old buggies and push it outside.
"I don't understand how they could have vulnerable people with health conditions left in a property [when] we had no water."
Another woman in Alto Court said: "It's been absolutely terrible... I've got three children [but one of them is] a baby [and] I need to sterilise bottles."
She said L&Q gave her extra bottles of water on top of the six they were providing but that this still was not "sufficient".
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She said: "There is a standpipe a few roads away to fill up water bottles - that's no good.
"I don't understand how they expect[ed] me to ferry with water when I have a baby... put the baby on my head?"
A spokesperson for L&Q said the housing association visited the buildings immediately when the issue was first reported and is repairing the pipework and water pump system.
They said: "We’re sorry for the inconvenience caused to residents by the water outage at John Street. We realise this has been a huge disruption, and are doing everything we can to fix the issue as quickly as possible.
"We have now restored all water to the majority of residents, and are working to bring this back to the remaining properties.
"Where we are unable to do this we have offered residents the option of moving into temporary accommodation, and have also offered to reimburse the expenses of any resident who chooses to move elsewhere whilst works are ongoing.
"Our teams have carried out welfare checks and door knocked all affected households to ensure residents are supported.
"We have provided residents with a supply of bottled water and installed a standpipe as close to the buildings as we could, providing an external source of water for residents and continued to provide deliveries of bottled water."
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