Oddly enough this is a very common problem. Having water come through the foundation walls in your basement is something that can happen to anyone, even with someone with great landscaping outside of their homes and proper backfill around their home.
The main issue here is that concrete is a porous material. It has the ability to absorb water. So when water comes into contact with dry concrete it gets absorbed into it and eventually fills up the pores inside of the concrete. These tiny pores are left behind from the water evaporating out of the concrete during the curing or drying process. Affectionately called microcosms, they have very thin separations of concrete between them. As the water is absorbs, the water molecules build up and create pressure. This pressure helps to break through these pore separations.
Eventually all basements leak. Once the pressure builds up enough, or the water works its way through the series of pores, it can break through and enter your basement from your wall.
Another, more obvious and easy, way for water to enter your basement is through foundation issues such as cracks or separations.
These cracks and separations occur for a number of reasons, but the problem comes from the water on your floor.
Waterproofing and Foundation repair are two ways to remedy these two situations that can allow for water to start piling up in your basement.
If you’re looking for foundation repair or waterproofing in your area:
www.nawsrc.org (national association for waterproofing and structural repair contractors)
www.pioneerbasement.com (MA, CT, RI, waterproofing and structural repair)
www.basementdepot.com (diy waterproofing supplies and crack repair products)
www.GrateProducts.com (a national waterproofing product and supply company; highly recommended for contractors)