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.
Pesticides and oil spills also cause major pollution to the water as does the use of detergent for cleaning near major bodies of water. Underground water is also polluted due to such toxic chemicals. Air pollution is the most dangerous form of pollution and comes from the chemicals released by the burning of various fuels.