A Thames Water spokesman says the water is not sewage.
They say it is the result of a burst water main, which had mixed with silt and mud.
Engineers are on site working to manage the problem.
More top news
London's Rio Ferdinand has announced his retirement as a professional footballer.
Two thousand women, and one very excited Barbara Windsor, put on their trainers today in a bid to raise money to fight cancer.
Two men have been jailed after a semi-automatic submachine gun was found hidden in a shoe box in a kitchen.