I feel you here, I'm on well water too, and it's the hardest water I've ever encountered! It's possible your breakage is from a mineral buildup on your hair, do you do any kind of acidic rinses or chelation?
I only use water treated with lemon juice to wash my hair (in gallon jugs) and I've noticed a huge improvement in how my hair looks and feels. Lemon juice is acidic and it chelates the minerals in my well water (I add about 1 TBSP to each gallon jug). I only need two gallons to COwash (I wash with conditioner, and then I use another heavier condish on the ends, so I'm wetting/rinsing my hair three times) and it works just fine for me. It does take some getting used to, and learning to handle the gallon jugs takes a few tries, but it's worth it!
I don't know how lemon juice affects chlorine, though. If you fill your bottles with well water and let them sit uncovered for 24hrs the chlorine will evaporate out.
HTH
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