pool in the back floor board on 2004 Toyota Matrix

I have a pool of water standing in the back floor board on the passenger side of my Matrix. I thought the door seals were bad, but no water on seats, or sides of door, only on carpet in back. Help before my floor board rusts away...

2 answers 2 comments
The water probably wouldn't be on the seats if the door had a leak. It would run down the door edge and then down into the foot well.
Thank you so much. My husband fixed it. I had the car detail today, because it smelled so bad. Thanks again!!!!
I have a pool of water standing in the back floor board on the passenger side of my Matrix
If you have a sunroof --your sunroof drains may be blocked which would utlimately cause the water to find a way inside your vehicle. I've heard of this problem occurring with Audi/VW and also have experienced it firsthand with my own car.