PATRICIA Crane has spent years watching reeds and debris take over Bado-Berong creek at Sans Souci.
She said ducks used to swim there but she hasn't seen any for about three years.
The reeds reach far above her head and are so thick they obscure the water beneath.
Despite complaining to the council numerous times she said nothing had been done to fix the problem.
"It looks like nothing on Earth," she said. "I've seen rats as big as cats come out of there.
"It's not just an environmental problem but a health hazard as well."
She also has concerns with the creek close to Bona Park.
"You can't even see the water with all the reeds there. I'm more worried about a child falling in and drowning."
A Rockdale Council spokesman said the reeds were a native species and didn't present a drowning hazard.
"The reeds are almost completely plant species which are native and local to the Rockdale area," he said.
"These reeds provide important environmental benefits and also act as a corridor for small native animal species moving across our city.
"Council does undertake a control program to remove priority noxious weed. Council avoids, where possible, impacting on the native reeds."
He said workers who maintained the site hadn't seen any rats.
Do you think the reeds are a problem?