TIP bosses have said sorry for a nasty niff which has had people all over Hyndburn holding their noses.
The "intolerable" smell of methane gas has been detectable miles away from the Whinney Hill landfill site in recent weeks – and has been worst in Altham, Huncoat and Clayton-le-Moors.
Apologetic officials say the cold weather could be to blame – and the Environment Agency has been called in to investigate complaints.
Altham Parish Council chairman Rennie Pinder has called for the site to close down until the smell is fully investigated.
He said: "The leakage of methane gas is absolutely disgusting. I went out in Altham last Saturday and had a job to breathe. It’s now becoming intolerable and it’s about time somebody came down hard on the operators Sita.
"They are making a lot of money out of Hyndburn and I’ve asked for the tip to be closed down until there’s an investigation."
Ken Ellard, who lives near the plant on Birch Close, Huncoat, said the smell of gas had got noticeably worse since the end of last year, but had also been an issue in previous summers.
He said: "Some days it does honk and we should not have to put up with it. If you decide to have a barbecue and the wind is in the wrong direction it will spoil your party.
"Sometimes you come out and think ‘God it stinks’. I’ve just got into growing vegetables so I spend a lot of time out there."
He added: "I think Huncoat is a poor relation in the borough and gets dumped on left, right and centre."
Stephen Pemberton, of Whalley Road, Altham West, said: "There is a gassy smell nearly every day. It’s really annoying but we have to put up with it. It seems to get worse about 3 or 4 o’clock in the afternoon. They’re a big company and it needs sorting out."
Sita UK is currently drilling gas extraction wells for electricity generation, but claims that "a combination of cool morning temperatures, high pressure and very low wind speeds" may have compounded the leakage of odours.
The Environment Agency says it is working in tandem with the operator to address concerns.
A spokesman said: "We are working with the landfill operator, who has identified the source of the problem and is currently working to put improvements in place.
"We will continue to work to ensure that the site meets regulatory standards. This includes inspections, monitoring and maintaining communications with the community. We will be updating those who have contacted us directly with their concerns over the coming days."
A planning application for an extra power generation plant on the Whinney Hill Road site, fuelled by landfill gas, has also been lodged by Sita UK.
A spokesman said: "We are committed to further investment in the gas management system and we are confident that the situation will significantly improve, moving forward as a result of our work with the Environment Agency to address any sources of odour."