Properly disposed of
That does not belong in the sewage
To be honest - you usually do not think about wastewater treatment when you flush your toilet, right? Maybe only then again when the waste water bill flutters into the house. Everyone can do their bit to ensure that the wastewater and thus our environment stays cleaner.
Avoid channel obstruction and locate
Channel blockages are usually caused by careless disposal (eg of wet wipes, diapers, feminine hygiene products) via the toilet, but also by damage in the property drainage system (eg due to pipe breakage or root ingrowth).
Rats in the canal
Leftovers in the canal are a great food for brown rats. Rats can not only live undisturbed in the public canal, but also in private property drainage systems, especially when regularly provided for the disposal of leftovers through the toilet for food replenishment. In the underground they have optimal retreat and no natural enemies.