10 Signs Your Septic Tank Is Full (or Failing)
Slow drains, gurgling, lush spots, foul odors — what each warning means.
Inside the house
Slow drains in multiple fixtures, gurgling toilets, sewage smells indoors, and backups in the lowest drain (often a tub or floor drain) are early warnings the tank is full or the outlet is restricted.
Outside the house
Unusually green or spongy grass over the drain field, standing water near the tank, foul odors in the yard, or an aerobic alarm panel light all mean it's time to call.