Combating Inflow and Infiltration

Yet in regions with older infrastructure, groundwater and stormwater that enter a sewer system can account for as much as 50% of flow.

The cost of this disruption should not be underestimated; in 2014 the EPA reported that wastewater collection and treatment expenses ranged from $2 to $5 per thousand gallons. An annual I&I volume of 150 million gallons would cost between $300,000 and $750,000 per year to transport and treat. Given that even small amounts translate into substantial costs, where should you draw the line on I&I? How much is too much?

Reducing the presence of I&I and preventing combined sewer overflows (CSOs) requires more than traditional rehabilitation methods. A proactive, strategic approach is essential to tackling the issue head-on, and the result is a more successful one—using fewer resources.

Our guide, Combating Inflow and Infiltration From the Inside Out, walks you through the steps you should be taking to reduce the presence of I&I in your system and avoid combined sewage overflow.

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About Inflow and Infiltration

Inflow and infiltration (I&I) is a risk in any wastewater system.

Yet in regions with older infrastructure, groundwater and stormwater that enter a sewer system can account for as much as 50% of flow.