HELENSBURGH'S waste depot will close on June 30 after a Wollongong City Council decision to shut the facility.
Councillors voted on June 12 to close the depot after a review found the site was no longer suitable to be used for landfill.
The depot was set up for sewage disposal in the early 1950s, and in recent years has accepted builders' waste, green waste and served as a recycling drop-off area.
Acting director of infrastructure and works Peter Coyte said the site didn't meet modern environmental requirements.
"It's not lined, and this means it's possible for leachate to seep through the ground around the site," he said.
"Given the nearby residential development and environmentally sensitive Royal National Park and the Garawarra State Conservation Area, the review highlighted the depot was nearing the end of its functionality."
The council plans to start rehabilitation work once the site is closed.
Recyclable items that do not fit in regular residential bins can be dropped off at at Lucas Heights.
For items such as televisions, computers, tyres and mattresses, Mr Coyte recommended people use Wollongong City Council's on-call pick-up service.
"You can book online, or by calling council's Customer Service team, and arrange for us to come and pick up your additional rubbish - twice each financial year - at a time that suits you," he said.
Details: visit wollongong.nsw.gov.au
or call (02) 4227 7111.