Council officials will make another attempt to tackle a rat infestation at a block of flats next week.
Vermin have overrun parts of the city-council owned complex in Marwood Road, Stocking Farm, causing misery for some residents.
The problem was reported to the council in October but attempts to solve it through work on the sewers below have failed.
Traps have been set by pest control officers but the rats have been breeding faster than they can be killed.
Tenant Mary Anne Gibbard, 24, said the rats had gnawed through the ceiling of her home, chewed through furniture and clothing and left the property covered in droppings.
She said she was unable to sleep because of rats scurrying behind her walls and under her floorboard.
Her neighbour Kerry Pick, 28, said she feared for the health of her 12-week-old baby and eight-year-old son.
The council said it intended to put cameras down the drains to try to find the source of the problem.
Assistant city mayor Andy Connelly, who is responsible for housing, said: "We apologise to the tenants affected by the rat infestation and in particularly to Ms Gibbard.
"Unfortunately, we have not been able to resolve this problem as quickly as we would have liked and we understand the frustrations.
"Our pest control team has been working closely with the occupants of a number of flats since this was reported in October. We've made a number of structural repairs, including to the sewer system beneath the block, and this seems to have solved the problem in some flats but not in others.
"We are going back next week to investigate the drains and soil pipes at all of the flats in the block and we're sealing the fascias of an adjoining building to eradicate the chances of rats entering here."
Coun Connelly said alternative accommodation had been offered to Ms Gibbard, which she had declined.
He said: "We will continue to look for suitable alternative accommodation for her until the problem is resolved."
Ms Gibbard said: "I'm totally fed up. All I want is for them to get the rats out of the building.
"It's stressful for us and it's unhealthy. They should have done something properly when we first reported it."
Ward councillor Vijay Riyait said: "There needs to be an investigation into how the rats got there.
"This is not the Middle Ages. People should not have to live like this.
"We need to consider if people need to be moved out of there while it gets sorted."
