The answer to 'why is my drainage system disease' is that a malfunctioning drainage system can lead to various issues, including waterlogging, soil erosion, and the growth of harmful fungi and bacteria. Common causes include clogged drains, improper grading, and damage to the drainage pipes.
Symptoms of a drainage system disease may include standing water, mushy or spongy soil, and the appearance of mold or mildew. If left untreated, these problems can lead to structural damage, health hazards, and decreased property value.