An emission from a County Durham chemical works, which caused irritation to passing motorists and residents, was the result of "a normal manufacturing process".
An Environment Agency spokesman said that the substance detected around the Thomas Swan premises, in Crookhall, near Consett, on Friday, was not toxic, but a mild irritant with a pungent odour, and presented no long-term health effects.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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 hereComments are closed on this article