What is a common consequence of hydraulic overload in a sewer system caused by infiltration and inflow?

What is a common consequence of hydraulic overload in a sewer system caused by infiltration and inflow?

• A. Sewer Back Up Into Homes
• B. Improved Odor Control
• C. Decreased Flow Velocity
• D. Reduced Infiltration

Answer: (A)

When infiltration and inflow push more wastewater through the sewer than it can carry, the system becomes surcharged and can push sewage back through home service connections. That pressure causes sewer backups into homes, basements, and low-lying fixtures, which is a common and visible consequence of hydraulic overload. The other options don’t reflect what happens in overload: odor issues don’t improve—and can worsen—when the system is overwhelmed; flow velocity isn’t typically the defining outcome of overload (the problem is backup and overflows); and reduced infiltration isn’t a consequence of hydraulic overload (infiltration is the problem, not the result).

When infiltration and inflow push more wastewater through the sewer than it can carry, the system becomes surcharged and can push sewage back through home service connections. That pressure causes sewer backups into homes, basements, and low-lying fixtures, which is a common and visible consequence of hydraulic overload.

The other options don’t reflect what happens in overload: odor issues don’t improve—and can worsen—when the system is overwhelmed; flow velocity isn’t typically the defining outcome of overload (the problem is backup and overflows); and reduced infiltration isn’t a consequence of hydraulic overload (infiltration is the problem, not the result).