Alarm on the sump pump went off early this morning and although we didn't unplug the system, we did turn off the alarm. We had our septic tank emptied 2 years ago and only 3 people live in our house so I'm pretty sure it isn't full again. What could be the issue?

Did the alarm go off because the water level rose too high?

We had our septic tank emptied 2 years ago and only 3 people live in our house so I'm pretty sure it isn't full again Are you saying that your sump pump is somehow tied into your septic system? Back to you, bTom