The water in our well is fairly acidic (PH 5.6). The only filtration that it has is one of those generic single stage water filter systems. We also have had occasional problems with heavy rain causing ground water contamination. When it does this the water gets cloudy and tests positive for coliform bacteria.

I've been treating it with Chlorox when this happens and then drain the well for 12 hours or so, basically a couple hours after a pool test kit has shown no chlorine is present.

I looked into getting the well sealed, but a camera in the well showed there are big enough cracks in the drill hole that the well guy didn't think a liner would necessarily fix things.

I've looked at getting a better water filtration system including a UV light to kill any bateria. I'd also like to neutralize the acidity of the well water. I understand that one problem repeatedly chlorinating a well is that there are carcinogenic compounds this creates. Does anyone know what the carcinogenic compounds are and if can I get them tested for? I'm concerned that treating the well with a strong base will have a similar effect to chlorinating it. Hopefully calcite won't generate these carcinogenic compounds.

-Eric