Gippsland residents are being warned to be wary of a scam involving water filters and false claims about the region’s drinking water.

Gippsland Water says a man is selling water filters by telling shoppers in Sale that effluent is about to be introduced into the region’s drinking water supply.

John Mitchell from Gippsland Water says the man is acting dishonestly to promote a product.

“We want to assure people that nothing like that has happened whatsoever, we have not put any treated effluent in the Sale water system or any other water system for that matter and we would not do that,” he said.