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There are a number of tablet products on the market that act as coagulants as well as providing disinfection. One of the difficulties in using chlorine and chlorine tablets is that the water must be free of organics (turbidity and suspended sediments). If this is not the case then the chlorine combines with the organics to form organo-chlorines, which will give the water a strong smell of bleach even at quite low concentrations of chlorines, rendering it unpalatable. The coagulants remove this problem. It is perhaps more appropriate, given your limited space, to consider finding a way to support disinfection by boiling once in country. This requires a jerry can, a pot and firewood, and the process will be known to the people you are working with. Cotton cloth (similar to the cloth in a t-shirt) makes a effective filter against suspended sediments and organics, and is economic if used with a screw top jerry can. See below for some links to suppliers and shippers of water purification tablets, you will have to contact them directly.

https://www.gripolabs.com/aqua_pura_water_purification_tablets.html

https://www.basegear.com/potable-aqua-chlorine-dioxide-tablets.html

https://www.aquatabs.ca/

https://www.quakekare.com/browseproducts/Water-Purification-Tablets.HTML

Regards,

Cody