I wish it was also possible to work with you. Water samples are usually sent in from various locations for analysis, although depending on the parameters to be worked on as some require Insitu analysis. Accurate results might not be gotten if water samples are not worked on immediately.
In response to your question….
Scientifically, the only way to confirm if the water is good, Is to conduct Water Portability on it.Once you have the result
You could tell if it needs Enriching with ions or further Treatment.
There are different ways you could treat this water...
You have normal softening
Using Charcoal and the rest, like you mentioned above..
Or the more sophisticated,using Zeolites process.
It’s really nice sharing thoughts on your post.
I am working on a post that will really help, and I will tag you to it.
Of course I know all this. I just can't find a water sample lab in the Philippines other than government ones that won't accept samples from private individuals (sigh).
As for zeolites I've only ever thought of them for their drying effect. Was going to look into them more properly when I start turning sugar-->alcohol-->distill-->zeolite-->vehicle fuel.
I've never considered them for water purification before. Look forward to reading your post.