Okay I'm definitely going to be your friend and I really wonder how hard it would be for me to get you some more information on water sources and water purification.
Water is life.
I will start with the farming comments.
A lot of your micronutrients can be built up in the soil lasting for many years if not decades.
Natural is the best way to go there are a lot of simple natural methods of farming because we have done this for thousands of years if not longer.
Handy tip looking to some biochar.
And for water filtration always pre-filter everything before you use this filter and then on top of it also boil any drinking water.
I have a Sawyer water filter here in the USA there $20 piece and they can filter 100,000 gallons of water.
They are cleanable and you can even put them in line with the old ones first.
Simple water pressure can be used to push the fluid through the filter.
It wouldn't be that hard or in the community to do a fundraiser for such a simple goal and as well whatever shipping is to your part of the world.
And then your testing articles and whatnot...
Absolutely phenomenal job and if you are in the natural medicine Discord channel I'd love to friend you and continue to help support your endeavors.
If you have food from nature and clean water you are truly blessed.
RE: I am a Hivian, and I utilize Compost manure in West Africa