The answer to 'why is my sump pump leaking water' is that the most common causes are a cracked or damaged sump pump housing, a faulty check valve, or a problem with the sump pump discharge line. Symptoms include water pooling around the sump pump, water leaking from the pump, or the pump running constantly. Solutions may include replacing the sump pump, fixing the check valve, or repairing the discharge line.
If the leak is minor, you may be able to fix it yourself. However, if the leak is significant or the cause is unclear, it's best to call a professional plumber to diagnose and repair the issue. Sump pump problems can lead to water damage and other serious issues if not addressed properly.