Investigations have been carried out after a river turn a milky-white in west Suffolk.
Anglian Water found that the Stour Brook river in East Park, Haverhill, became discoloured on Tuesday, May 10, after a spillage of limestone powder at a nearby industrial estate.
The Environment Agency notified Anglian Water.
An Environment Agency spokesperson said: "Investigations by the company showed a slight increase in ammonia concentrations, which was traced to a surface water outfall near Coupals Close and Victory Row.
"A blocked sewer was also found on Helions Bumpstead Road and cleared.
"Anglian Water also discovered a spillage of limestone powder - the likely cause of the water discolouration - at a nearby industrial estate, which was cleared by the operator.
"Environment Agency officers took water samples from the Stour Brook the following day, which revealed that the impact on the brook was minor, localised and short lived.
"No impact of fish or wildlife was observed."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here