Cost of "shocking" a well?

You have already "shocked the well" That is what the chlorox bleach thing is. But how much bleach did you put into the well. And what type of well do you have? A deep well or a shallow well? You are clearly talking to people who are poorly informed. First of all what did the well and septic inspector tell you to do. Relative to the test coming back, that told you that everything is fine "except" for the chloroform. He really means coliform, which is a bacteria.Chloroform is a chemical solvent and not likely to be found in well water. That is a damn big exception and some what of an unusual result. The test should have told you the amounts of total coliform and fecal coliform.Fecal coliform is human waste and total coliform includes other waste from animals other than human. And frequently when coliform is found in a well there is some level of nitrates. Normally the guy who did the well and septic test should have had a suggestion as to what to do with your coliform problem. If your well and septic tester also sells water treatment equipment I would get another test done by any local water testing lab. Adding bleach to your well does not create chloroform. Coliform is a bacteria. Shocking your well with bleach is a one time try. Doing that over the long term creates many other contaminants.