WORK to restore a Pemulwuy lake began this week after its surface was left smothered by noxious weeds for months.
Since January, the aquatic weed Salvinia has spread across the the entire surface of a lake at Stockland's Lakewood residential community, despite complaints from residents to Holroyd council and the developer.
On Monday, contractors with an aquatic weed harvester began the task of clearing the plant, which poses a serious threat to waterways around the nation.
Pemulwuy resident Lynda Millerd was pleased work had started but said had action been taken when the weed was first noticed, the problem would not have been as bad nor would it have been such a big job.
"It's a shame because the wildlife seems to have disappeared from the lake," Ms Millerd said.
Stockland regional manager Stephen Barlow told the Sun the "slight delay" in the clean-up was caused by unfavourable wind conditions experienced by the contractors at their previous work site.
The company was "looking forward to restoring the lake's natural ecological balance as soon as possible" and the clean-up would be finished in two to three weeks. "The process involves removing the weed from the lake using the harvester, covering it up on the banks of the lake and, once it has died, taking it to a specialist landfill," Mr Barlow said.
Under the Noxious Weeds Act, failure to control noxious weeds can result in a fine.
Councils can enter private land to eradicate noxious weeds, charging the clean up cost to the landholder.
A Holroyd Council spokeswoman said the matter was referred to the Department of Primary Industries on June 17.
There has been a previous infestation at the lake.