Several hundred homes in Hertfordshire suffered a water shortage early on New Year's Day.
Supplies were reduced to a trickle in the Jersey Farm area of St Albans and Anglian Water sent engineers to investigate the cause.
The firm said it dealt with more than 3,000 burst pipes and water mains across the region over Christmas and about two thirds had been repaired.
The firm blamed the number on "freezing and thawing weather conditions".
A spokesman said earlier that the company was experiencing its most difficult winter on record, with daily customer calls up 400% compared with previous years.
Anglia Water operates in Essex, Hertfordshire, Norfolk, Suffolk, Cambridgeshire, Northampton and Milton Keynes.
"Typically, we'd take around 26,000 calls over this period," he added.
"In fact, we've taken about 46,500 up to 20 December - about 80% more than we would expect.