Dubbed the ‘Sealand stink’, residents have described in local press reports a “foul smell” coming from a farm on Sealand Road.
One resident, who asked to remain anonymous, told Cheshire Live that locals living on the road have been left “disgusted” at the smell that has been likened to “dead bodies and human waste”.
Regulator NRW said it was aware of the smell and that it was working with the land owner, local authorities and council to investigate the matter.
The resident said: “We have now endured the smell for almost a month and it has become unbearable.
“After speaking with other fellow residents, many who are farmers who have been here for years and years, they agree too that it's unlike anything they have ever smelt before.”
The notorious 'Sealand stink' has plagued the area for decades with many residents over the years complaining about the issue.
There have long been question marks about the source of the smell, which is on the road that borders England and Wales, according to Cheshire Live.
In 2014, Welsh Water promised to spend £1m on eliminating the odour.