The compendium should include what appears to be the most highly sustainable technology of water treatment for the poor:  water filter media and systems of granulated ceramics, coated with a small amount of silver.  Once implemented these will get POU, safe drinking water to the poor, easy walking distance from their homes.  It was field ready when first developed in Nepal, in 2003, but unimaginable roadblocks have prevented it's implementation.  Here are links to an article and an image.  http://tamceramics.com/wp-content/uploads/2019/01/TAM-feature_01-02-2019.pdf           https://drive.google.com/file/d/1hxQ88QgAL8TEhPSrkZwwB-xPYtAWlnYc/view?usp=sharing

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The compendium should include what appears to be the most highly sustainable technology of water treatment for the poor:  water filter media and systems of granulated ceramics, coated with a small amount of silver.  Once implemented these will get POU, safe drinking water to the poor, easy walking distance from their homes.  It was field ready when first developed in Nepal, in 2003, but unimaginable roadblocks have prevented it's implementation.  Here are links to an article and an image.  http://tamceramics.com/wp-content/uploads/2019/01/TAM-feature_01-02-2019.pdf  

        https://drive.google.com/file/d/1hxQ88QgAL8TEhPSrkZwwB-xPYtAWlnYc/view?usp=sharing