I have water leaking into my driver's side floorboard.
Your water leak could be coming from numerous locations. However, if your vehicle has a sunroof, the drain tube may be the cause. This tube drains right onto the floor boards. Other potential causes include the windshield, marker lights and trim moulding. If you would like to have this issue taken care of, a trained professional, such as one from YourMechanic, will be able to diagnose and repair your leak for you.