Nicky Barker-Gorse, who lives on the Darnhill estate in Heywood, said she was no longer letting her children go outside.
The 40-year-old said: “The smell when it’s at it’s worst is a very eggy, gassy, offensive smell. It makes you want to be physically sick.”
Residents have said they were also hit with swarms of flies over summer, which they believe came from the site.
Ms Barker-Gorse added: “We had a massive infestation of flies. You had to cover up your drinks, your food. You just had to keep everything closed up all the time.”
