Water leaking onto the passenger floorboard is most likely caused by the area around your cabin airfilter being clogged with leaves and other debris... Water can't drain out the drain path so it finds it's way down the chute where the cabin air filter is located...To get to this area do the following:
Park your wipers in a vertical position on the windshield.
Remove the two fasteners holding the black trim piece located below the wiper arms (it's in two halves, you only need to remove the half on the passenger side).
Remove, or pivot away, the black trim piece.
Clean out this whole area, replace the cabin filter, and button it up!