What indicators suggest that a septic system needs maintenance?

Indicators that suggest a septic system needs maintenance include standing water, strong odors, and slow drains because these signs point to a malfunctioning system. Standing water around the drain field indicates that the soil cannot absorb liquid effectively, often due to clogging or saturation. Strong odors can signify that waste is not being treated properly, potentially indicating a backup or overflow. Slow drains suggest that wastewater is not moving through the system as it should, possibly due to blockages in the pipes or saturated soil. Together, these symptoms present a clear picture of a septic system that is in distress and requires immediate attention to prevent further issues or potential environmental hazards.