Which of the following can lead to septic system failure?

Excessive water use is a significant factor that can lead to septic system failure. When a household uses more water than the system is designed to handle, it can become overloaded. This overload can prevent the septic tank from settling properly, hindering the separation of solids and liquids. As a result, undigested solids may enter the drain field, leading to clogging and potential backup into the household plumbing.

Additionally, when too much water enters the system too quickly, there may not be enough time for the natural bacteria in the tank to effectively treat the wastewater. Over time, this imbalance can compromise the functionality of the septic system, resulting in costly repairs and environmental concerns, such as groundwater contamination.

In contrast, regular maintenance and inspections, using biodegradable products, and proper waste disposal help maintain the efficiency and longevity of a septic system by promoting effective waste processing and preventing harmful substances from entering the system.