A water treatment facility that treats water from an industrial waste stream that has contaminated the Thames in the north east of England could be shut down.
The site in Whitechapel was inspected by the Environment Agency in December and found to have a level of PCBs and PCBs that are the same as levels found in contaminated water in the UK.
The Environmental Protection Agency said it was working to find another site for the plant.
The company that owns the property said it had a long-term environmental commitment to the Thames and the Thames estuary.