Basic Wastewater Operator Practice Exam

When infiltration and inflow (I&I) in a wastewater collection system are not effectively managed, one of the primary consequences is the overloading of the sewer system. Infiltration refers to groundwater entering the sewer system through cracks or breaks in the pipes, while inflow involves stormwater or surface water entering the system, typically through direct connections or improper drainage systems.

When both infiltration and inflow occur excessively, they can significantly increase the volume of water the sewer system must handle. This added burden can lead to several serious issues, including backups, overflows, and reduced treatment efficiency at wastewater treatment plants. Overloading can also cause damage to the infrastructure and lead to increased operational costs as the system struggles to manage the excess flow. Therefore, controlling I&I is crucial for maintaining the integrity and proper functioning of wastewater management systems, ensuring they can effectively treat wastewater without being overwhelmed.