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R.O. water filtration will filter out anything like that but also will filter out the salts in water from water softeners. You need the softener to remove hard water items like calcium and lime which builds up and ruins your water heater, and builds up in your pipes and faucets.
What does it cost?
Ya can buy water softeners and they should be sized according to your water usage.. A Reverse osmosis filtration system will remove the salt from the water softener and you will have really very pure water for drinking..
R.O. filtration uses cartridge filters. Water softeners use basically bags of Salt pellets. It all just depends on how much water you consume.... or intend to consume in a month...
Wuz jes thinking about water purity...
and not having yer water heater ruined due to hard water deposit buildup inside..