Moonshot Missions Releases Inflow and Infiltration Guidance Document

Check out our I&I Module here!

We are excited to announce the publication of an ‘Inflow and Infiltration Guidance Document’ for Wastewater Utilities' developed by Moonshot Missions, with generous funding from the Great Lakes Protection Fund (GLPF).  This publication is part of Moonshot Missions’ broader mission to deliver tailored technical assistance and scalable solutions to utilities across the country.  

Inflow and Infiltration (I&I) are persistent challenges for wastewater utilities, particularly in communities with aging infrastructure. Excessive I&I can overwhelm wastewater treatment plants, increase operating costs, and lead to sanitary sewer overflows (SSOs) or basement backups. In some systems, I&I can account for up to 40% or more of total flow during wet weather, forcing utilities to treat large volumes of essentially clean water. This not only reduces system capacity for actual sewage but also strains public resources and threatens environmental public health.

This guidance document offers a practical, accessible tool for wastewater utility operators and managers to evaluate their systems and implement cost-effective strategies for mitigating I&I. The document provides:

• An overview of the causes and consequences of I&I

• Frameworks for assessing and evaluating system vulnerabilities

• Solutions and implementation strategies

• Maintenance and asset management best practices

• Case studies from utilities that have implemented I&I reduction programs  

The Inflow and Infiltration Guidance Document is now available for download at the button below.

Download here

To learn more about Moonshot Missions' work in water equity and utility resilience, visit our Great Lakes Page.