What should homeowners regularly check to maintain their septic system?

Homeowners should regularly check for signs of leakage or blockage to maintain their septic system effectively. This is crucial because a septic system relies on proper flow and treatment of wastewater. Any leaks or blockages can lead to untreated waste contaminating the soil and groundwater, which poses health risks and environmental consequences. Identifying these issues early can save homeowners from costly repairs and protect public health by ensuring that the system operates as intended.

The other options, such as outdoor landscaping plants, may influence the system's performance but are not direct indicators of the system's health. The condition of air vents is less critical compared to signs of leakage or blockage, and while weather patterns can affect the system temporarily, they are not a routine check for homeowners. Therefore, focusing on signs of leakage or blockage is the most vital aspect of regular maintenance for a septic system.