Which of the following is a common indicator that a septic system may be failing?

A strong odor near the drain field is a common indicator of a failing septic system. This unpleasant smell can result from a variety of issues, such as an overflowing tank, clogged drain lines, or a saturated drain field that is unable to properly filter waste. When a septic system is functioning correctly, the waste should be effectively treated and contained, preventing any strong odors from escaping to the surface.

In contrast, thriving original plants or no noticeable changes in drainage do not necessarily indicate a problem with the septic system. In fact, healthy plants can sometimes mask symptoms of malfunction by filtering out excess nutrients. Frequent inspections by professionals are typically a proactive measure rather than an indicator of failure; they help ensure that the system is monitored and maintained effectively. Therefore, noting strong odors is crucial as it directly points to malfunctions that require immediate attention.