Septic alarm beeping? What it means and what to do
Not every septic system has an alarm. If yours does, it's usually because your system has a pump, for example to push wastewater uphill to a drainfield, or an advanced treatment unit. The alarm, often a box with a red light on a post or on the house, sounds when the water in the pump tank rises higher than it should.
Most of the time, it's a warning with time to act, not a disaster.
General guidance only. Follow your system manufacturer's instructions and your service provider's advice. Never open a septic tank or pump chamber. The gases inside can be deadly.
First steps
- Press the silence button if there is one. That stops the noise, not the problem. The light usually stays on until the water level drops.
- Use as little water as you can. Skip laundry, the dishwasher and long showers. The tank needs time to catch up.
- Check the breaker for the septic pump or alarm. If it's tripped, reset it once. If it trips again, leave it off and call for service.
- Check any GFCI outlet that powers the pump or control panel, and reset it.
- Give it a few hours. If a burst of water use or a heavy rain caused it, the pump may catch up and the alarm may clear on its own.
Steps 2 through 5 follow guidance from septic equipment manufacturer Premier Tech Aqua.
Common causes
- Power to the pump was cut off: a tripped breaker or GFCI
- A lot of water in a short time: holidays, guests, several loads of laundry, or a running toilet
- Heavy rain or snowmelt soaking into the tank or drainfield
- A worn-out pump or a stuck float switch
- A clogged filter on systems that have one
- A drainfield that can't take more water, often from years without pumping. This is the most serious cause.
Call a septic company today if
- The alarm comes back after you reset the breaker, or doesn't clear after a few hours of light water use
- The breaker trips again
- Drains are slow or gurgling, or a toilet won't flush normally
- Sewage is backing up into a tub, shower or floor drain
- You see soggy ground or surfacing sewage, or smell sewage outside
If sewage is coming into the house, stop using water entirely and keep kids and pets away. See septic backups and slow drains.
Why not to wait in the Valley
In karst areas like much of Rockingham County, sewage that surfaces or seeps from a failing system can reach groundwater quickly. Virginia's Department of Conservation and Recreation warns that failing septic systems can contaminate karst groundwater (Virginia DCR). If you or neighbors have wells, a repeating alarm is worth fixing fast. See well water and septic.
In winter, an alarm with slow drains can also mean a frozen line. See septic systems in winter.
Need service?
Tell us what's happening and where you are in Harrisonburg or Rockingham County. We'll connect you with an independent septic company that serves your area. It's free.