Private inflow and infiltration reduction in New England towns

摘要

Sources of inflow and infiltration (I/I) from private sources, such as floor drains, roof drains, and sump pumps, can contribute significantly to overall wet weather flow rates in municipal wastewater collection systems. Given the right circumstances, private I/I removal can be successfully implemented and can remove significant extraneous flows. Issues that must be addressed in removing private sources of I/I include access to and easements across private property, determining who pays for removal, and enforcement after work is completed. This article will discuss case studies of private I/I removal projects implemented in Cape Elizabeth, Maine; Berlin, New Hampshire; Baileyville, Maine; and Exeter, New Hampshire.