Good article, I have actually covered the ways to make drinking water through the use of filters, removal of water hardness and reverse-osmosis filtration, a few articles back. You have went more in depth and I agree with your findings.
In order to be more visible to SteemSTEM you can engage the other authors and comment, complete or question their articles. People tend to remember the other people they have meaningful contact with so you will get free publicity.
RE: SAFE DRINKING WATER IS ESSENTIAL