It does seem to roughly jive with the other reports I've seen for Marietta and Cobb so although things may change seasonally, I doubt it's much to worry about. This water is very soft so a lot of water concerns folks have with hard water just won't apply to us folks - very lucky. That being said, I use RO now and adjust to suit the profile, so I've not thought about it too much - others might have more insight to the variability.
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