Over 3,500 workers at Scottish Water have begun a ballot on strike action over pay.
The workers, in the Unite and GMB unions, are angry over the fact that management imposed a below-inflation pay deal of
3 percent over 15 months.
There are 44 treatment plants across Glasgow and the west of Scotland.
Richard Leonard of the GMB said, “If treatment works are closed then it will be damaging.
“There would soon be a backlog and the smells would build up.
“Take a sewage treatment works such as the one at Shieldhall in Glasgow. The smells from there would be noxious over a sustained period of time.”
The action would involve sewage treatment workers and engineers who normally deal with underground pipe bursts.
The ballot ends on 10 November.