Isoflavones are found in small amounts in a number of legumes, grains, and vegetables, but soybeans are by far the most concentrated source of isoflavones in the human diet (104, 105) .
Standing water under a house is usually the result of only two things; either a leaking water line, or from surface water drainage around the house. If it was from a leaking water line, the leak would have to be substantial, and you would hear running water in the house.
There are many causes for water contamination but they fall into two general categories: Direct and indirect contaminant sources. 1  Direct sources - factories, refineries and waste treatment plants that discharge fluids directly into water supplies.