Three Fife towns suffered more than 800 sewer and drain blockages last year.
Scottish Water revealed networks in Dunfermline, Kirkcaldy and St Andrews had the most problems as it urged people to dispose of bathroom items correctly.
Most of the choked-up drains and sewers engineers have to deal with are caused by wipes, nappies and sanitary products being flushed down toilets, which can end up on beaches and along the coastline.
In Dunfermline 363 blockages were dealt with, in Kirkcaldy 348 and in St Andrews 107.
As it launched the latest phase in its Keep the Water Cycle Running Smoothly campaign, the utility company outlined the costly impact of flushing away anything other than toilet roll and human waste.
Campaign manager Scott Fraser said: “The majority of sewer blockages are entirely avoidable as they are caused by items such as wipes, nappies and sanitary items being put down toilets.
“The waste water drain which runs from your house to the public sewer is usually only about four inches wide, which is less than the diameter of a DVD.
“This drain is designed to take only the used water from sinks, showers and baths and pee, poo and toilet paper, the three p’s, from the toilet. The message for customers is to put all bathroom waste items in the bin.
“We are committed to reducing the impact of sewer blockages and the misery of sewer flooding which can be caused in homes, businesses and in streets. In some circumstances this issue can affect Scotland’s beaches and coastal environment.”