My well has coliform bacteria. To date I have had 4 cholorinations, had the holding tank replaced as well as the well cap. Still it has bacteria. I have been told that I have high amounts of iron in my water which may be making the problem harder to get rid of. Also, would dog feces have caused the problem orginally? What can I do ??? I have been without useable water for over 2 months. If in fact the iron is in the pipes how do I get rid of it? The cholorinations are being done by a reputable well company. Any suggestions?