Welcome Timorrill:
If there is water comming up through the slab it indicates the slab is bleow grade. If it is a basement floor, you may have to dig out a sump in that location and set a pump.
If we are talking about a 'slab on grade', check around the house and make sure someone hasn't filled in too much dirt. Also, make sure the gutters are working and discharging the water away from the house.
Glenn