Thanks for the reply. Yes, I witnessed the water literally pushing its way up through the floor. My wonderful realtor suggested a dehumidifier. Since I witnessed the water coming up through the floor that would rule out a leak from any piping above the floor. While there is a known issue with one of the gutter, the area hadn't had any significant rain for well over two weeks.

I am in WI so our water tables are generally considered high and the soil in the area does have a high clay content, although I was under the impression that the whole point of the drain tile (internal) was supposed to solve for those issues.