WEF Committee Releases Infiltration and Inflow Fact Sheet

Private Property Infiltration and Inflow Fact Sheet

Click to see the Water Environment Federation (WEF; Alexandria, Va.) Collection Systems Committee fact sheet on reducing private property infiltration and inflow. WEF photo.

In September, the Water Environment Federation (WEF; Alexandria, Va.) Collection Systems Committee released a fact sheet on reducing private property infiltration and inflow (PPII).

Infiltration and inflow of stormwater and groundwater into sanitary sewers can overwhelm the sewers’ capacity and cause overflows. Sewer laterals, which connect buildings on private property to sewer mains, can be a significant source of infiltration and inflow. Rehabilitating or replacing infrastructure on private property can present unique challenges for municipalities.

The fact sheet was developed to help communities address these legal, funding, public outreach, and implementation challenges. It outlines key considerations for municipal utilities establishing a framework for PPII mitigation activities. It also includes a list of additional resources.

Information included in the fact sheet supplements information presented in an overarching fact sheet on sanitary sewers published in 2011 by the Collection Systems Committee.

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