Citroen Saxo 2001 model water seepage?

There is a significant amount of rain water that appears from under the carpeting just in front of and behind the driver's seat. This happens when it rains, and even if the car is stationary, so the source must be rain, and not driven ground water. the door seals are fine, and i have sat in the car in the rain, and no water drips onto the carpet - it seems to 'rise' out of the carpet. Help!!