The answer to 'why is my irrigation system disease' is that an irrigation system can become diseased due to a buildup of bacteria, algae, or other microorganisms in the water lines and sprinkler heads. This can happen when the system is not properly maintained or if the water source is contaminated.
Some common symptoms of a diseased irrigation system include clogged sprinkler heads, reduced water pressure, and discolored or foul-smelling water. If left untreated, a diseased irrigation system can lead to further problems like plant damage, soil erosion, and even health issues for the homeowner.