What is a common indicator of biofouling in water systems?

A common indicator of biofouling in water systems is unusual odors or decreased water flow. Biofouling occurs when organisms such as algae, bacteria, and other microorganisms grow on surfaces in contact with water, which can create blockages and reduce the efficiency of the system. The growth of these organisms can produce waste products that generate unusual odors, signaling a deteriorating water condition. Furthermore, as biofouling accumulates, it can lead to a decrease in water flow due to clogging, highlighting the need for maintenance or remediation to restore optimal function.

Other indicators, while they may suggest issues within the water system, do not specifically relate to biofouling. For example, excessive foam buildup, high sediment levels, and the presence of oily residue could stem from different problems, such as contamination, chemical reactions, or other types of fouling, rather than from the biological growth associated with biofouling.