Arsenic removal from drinking water biosand filter design in Cambodia

link to research

All 10 test filters have consistently reduced arsenic levels from an average of 637 ppb to less than 50 ppb. That is a 95-97% average removal percentage range.

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great work
thanks

please continue this great work to eredicate diseases.

keep it up

where in Cambodia was the testing done?

and what arsenic contamination sources were there?