Septic systems after hurricanes and heavy rain

After a major storm, the instinct is to flush the toilet and see if things still work. Don't. A few minutes of patience saves a lot of grief.

What to check first

• Is there standing water over the drainfield? If yes, the system has nowhere to drain. Minimize water use until the area dries out.

• Are there gurgling sounds from drains, or sewage odor near the tank? Those are signs the system is overloaded right now.

• Did floodwater reach the access lids? Don't open them while wet — and don't pump the tank while groundwater is high, because an empty tank can float out of the ground.

The saltwater problem

If you're in a coastal area and your system took on storm surge, you have a second problem: saltwater is hostile to the bacteria that make a septic system work. The biological mat in the drainfield can be damaged, and the system can run sluggishly for weeks or months even after the visible water is gone.

After Hurricane Ian, a lot of Cape Coral and Fort Myers systems showed exactly this pattern: technically functional, but visibly struggling well into 2023. If your system was inundated by salt or brackish water, a follow-up inspection 30–60 days later is worth the cost.

When to call a professional

Call sooner rather than later if you see: sewage backing up into the house, persistent wet spots over the drainfield after the yard has otherwise dried, or any sewage odor inside the home. These aren't 'wait and see' symptoms.