drilled wells are a funny thing, you can drill a well and the water will be great. Over time the water running through the under ground aquifers can hit mineral deposits and when it does the water picks up these minerals and is then pumped into your househould water system, changing the once terrific water into something that you have been experiencing. It sounds like you have a problem with PH and sulphur. A PH level lower than the neutral 7 level can be acidic, and in copper plumbing systems will slowly deteriorate the the copper piping leaving the green stains on your porcelain and fiberglass fixtures. Have a reputable water conditioning company do a water test, these problems are correctable with the proper equipment. Good luck and let us know how things come out. Scott Thurston