A foul smell plaguing parts of west Belfast has been traced to a landfill site, according to environmental chiefs.
Residents in the Colin, Hannahstown and Glen Road areas have become increasingly concerned about the odour, with people complaining of headaches and nausea caused by the stench, which has been compared to damp clothes.
Officials have now named the Mullaghglass landfill site, which is operated by Alpha Resource Management and was previously blamed for the smell, as the source.
The Northern Ireland Environment Agency (NIEA), which recently gave the landfill the all-clear, told the Anderstonstown News that inspections "have substantiated complaints from residents in Mount Eagles that there is an odour nuisance in the area which has been traced to the Mullaghglass landfill".
The agency said it had been in discussions with the operator to address the issue and that the smell was caused by "seepage of landfill gas".
It added that the operator was bringing forward plans to install gas extraction wells, with work to begin this month.
The agency also said there were "occasions when an odour can be detected" from Montupet, a car parts manufacturer in Dunmurry, although the company is compliant with all relevant regulations and emissions are below limits.
It too is engaging with the NIEA and monitoring equipment to minimise emissions.
West Belfast MLA Orlaithi Flynn has been fielding complaints from residents.
She told this newspaper that, having spoken to the NIEA, she had been assured that measures were being taken this week to tackle the problem.
"We know that the landfill site is nearly at capacity and is due to close in December 2021. As such, this is now a critical time," Ms Flynn said.
She has contacted Environment Minister Edwin Poots, asking for an odour management plan to be put in place, along with a continuous monitor.
"Residents need to be assured that this issue is prioritised and that appropriate long-term measures are put in place immediately," Ms Flynn said.
"I was assured that measures are being taken to reduce the odour, with new gas cannisters being fitted this week.
"Engineers were starting work on the site on Tuesday. This work will take a few weeks and the joint visits between NIEA and Integrated Pollution Prevention Control will take place on a routine basis."