supplies of bottled water have been recalled after a Leeds-based customer flagged up health concerns about the product.
Andrew Crook from Broadlands Associates was horrified to find black specks in the bottle on top of his water cooler.
He made the discovery after members of his team had already started to drink water from the cooler in the business’s Headingley office.
Mr Crook said: “It is not acceptable because we have got mould floating around in our water cooler.
“It’s just disgusting and it looks like a jellyfish.
“It is not something you would expect in bottles of water at all.”
Environment Agency analysis confirms the growth is “non- hazardous”.
However, further tests will help identify the type of mould found in the bottle.
Countrywise Water Coolers Ltd and Hepscott Water said they had recalled a number of bottles within a batch supplied by Wenlock Spring across the Yorkshire and Lincolnshire region.
A spokeswoman from Countrywise said: “The bottler Wenlock Spring is in close touch with their relevant Environmental Health Officers.
“No reports of ill-health have been received and the initial tests from the laboratories indicated that there is no cause whatsoever for concern.
“A programme of recall has been in process and all of this batch has now been recalled and all relevant coolers on customer sites sanitised.”
A Hepscott Water spokeswoman added: “We take our responsibilities to our customers very seriously.
“We believe in providing quality products and service, via quality certificated contractors, dispensed with the highest standard of attention and professionalism.
“We followed strict recall protocol to ensure that all water bottled in the same bottling batch was removed from all our customers’ premises.”
The spokeswoman added: “Countrywise also sanitized each customer’s water cooling dispenser just as an additional precautionary measure.”