WATER supplies to 443 postcodes could be contaminated with E. coli – with families told to boil water to stay safe.
Hundreds of homes in Surrey and Kent may be affected by the bacteria – with it in their drinking water.
The problem was found during routine tests, SES Water said.
Teams are now working around the clock to investigate and make sure all supplies have no trace of E. coli.
Around 6,200 homes in Redhill, Oxted, Limpsfield, Godstone and Sevenoaks are all thought to be affected.
Schools are also believed to be in the areas affected, but local councils have declined to name any specific ones that might be in a hotspot awaiting test results.
Residents in those areas have been told to boil their tap water to ensure it is safe to drink – and also give cooled boiled water to their pets.
Some areas have come back with an all clear, to find out if this applies to where you live type your postcode into this link.
The E. coli bacteria usually lives in the intestines of healthy people and animals.
It is generally harmless or only causes mild diarrhoea, but some strains can cause a more serious illness.
Patients who suffer with the more dangerous strains can have severe stomach cramps, bloody diarrhoea and vomiting.
A statement from SES Water said: “We are supporting our most vulnerable customers as a priority.
“We are very sorry to everyone who is being affected. Everything possible is being done to do further testing.”
What is E.coli?
Escherichia coli is a type of bacteria common in human and animal intestines.
While most types of E.coli are harmless some can cause serious food poisoning and infection.
E.coli bacteria is a common cause of cystitis – an infection of the bladder.
Some types of E.coli can cause gastrointestinal infections.
What are the symptoms of infection?
Some E.coli strains produce toxins (Shiga toxins) that can cause severe illness.
One common strain called E.coli 0157 produces such toxins and is usually responsible for the outbreaks that are covered by the news.
Classic symptoms linked to this strain, that include severe stomach cramps, vomiting, and diarrhoea that may be bloody.
The symptoms usually last up to seven days if there are no complications, but some infections can be severe and may be life-threatening.
Just after 5pm on Thursday a statement said: “Following a positive result for E-coli from one sample at our Westwood Water Treatment Works on Thursday, we put in place a precautionary boil notice for customers whose mains water is supplied from the site – this is around 6,500 properties in and around Oxted in Surrey.
“We apologise for the inconvenience and concern this may be causing… Brinkwire Brief News.