Inflow & Infiltration
Inflow and Infiltration (I & I) occurs when rainwater and groundwater enter the sewer system as illustrated in the diagram below. When I & I is mixed with sewerage the necessary capacity for the receiving wastewater treatment plant can double and even triple. In addition, excessive I & I reduces the carrying capacity of the sewer lines which can lead to surcharged manholes, overflowing manholes, and the exposure of our community to the diseases and pollutants carried in wastewater. Removing extra water from the collections system helps 1) reduce the need to build new wastewater treatment plants in the future, 2) reduce the potential for property damage, and 3) ensure a clean environment for future generations.
Sewer utilities across the country are facing challenges including the need for increased system capacity and the ability to meet stricter state and federal environmental regulations. Western Carolina is well-positioned to deal with these challenges and is partnering with several subdistricts to ensure the necessary infrastructure is in place to sustain future economic growth.
