Northern Ireland Water has admitted polluting a Co Down river after the sewage system was blocked.
The company was fined £500 after pleading guilty at Downpatrick Magistrates' Court to causing the February 20 2008, discharge.
A spokeswoman for NIW blamed items like rags, plastic bottles, baby wipes, cotton buds, sanitary items being flushed into the sewage system and causing the blockage.
"Many people genuinely don't realise the potential damage they are doing, not only to their own internal pipes, but also to the sewerage system by flushing baby wipes, sanitary items and cotton buds," she said.
"Unfortunately, in this case, inappropriate flushing has resulted in the sewer overflowing and causing this pollution incident and damage to the environment.
"NIW takes any issue of pollution extremely seriously and acted quickly to clear the blockage."
NIW spends over of £1.7 million per year clearing blocked drains and sewers.