The issue is affecting people under the KT18 postcode, which covers parts of Epsom and Tattenham Corner in the Epsom and Ewell Borough.
The issue is due to a leaking pipe by the West Hill underpass, which Thames Water engineers have been working to repair.
The repair itself has been complex due to the pipe’s location.
The West Hill underpass, which is a vital route into Epsom, has been closed.
Engineers have been on the site all morning, and the closure has been necessary to ensure the safety of both the engineers and the public while this emergency work is carried out.
Thames Water apologised for the inconvenience this is causing and promised to continue working around the clock to fix it as quickly as possible.
