Adelaide authorities have revealed the top five "truly ridiculous" items residents have flushed down the toilet or somehow dumped in the sewerage system as part of a campaign to change people's habits.
SA Water production and treatment senior manager Lisa Hannant said the finds were "mind boggling".
"It was rather difficult to narrow it down to a top five list, as there's some truly ridiculous things Adelaideians put down the toilet," Hannant said.
READ MORE: The Aussies facing $220 fines from Monday
An intact football and a Batman costume are among the top five.
A pair of pants, a traffic cone and a set of false teeth owned by someone named John round out the list.
"If John really wants those teeth, we actually have them, out at Bolivar," Hannant said.
"The solution is super simple: Only ever flush the three Ps — pee, poo and (toilet) paper. And in the instance of the costume and footy, they should have been placed in the general waste bin instead.
READ MORE: NASA announces expert UFO investigation team
"I think trying to flush a traffic cone would be too audacious, so it's more than likely someone managed to open one of our access covers on the road and pushed the cone into the sewers."
SA Water spends about $2 million a year removing unnecessary items from the system, which is vital in keeping the environment and residents healthy.
Hannant said what goes into the sewer is not a case of "out of sight, out of mind".
"I've seen some of the nastiest sewage overflows and let me tell you, those sights may never leave my mind," she said.
"We need to respect our sewers instead of treating like rubbish bins."
