TwoCrows isn't telling you that you can hurt your birds with well water. She's telling you that hers was too high in sodium for chickens.@TwoCrows :
Thank you for telling me that.
I did not know you could hurt your birds with water from WELL...!!
Just get your well water tested. You can buy online tests you do yourself, or you can get ones you send your water in, or you can check with your county's health department as they may test it or give you resources to who does.
Our well water is fine but I still buy bottled water for newly hatched chicks for their first week or two as a precaution.