The Netherlands has been at the forefront of research on arsenic removal technology, developing an innovation that removes arsenic to levels below the WHO drinking water guideline — as low as less than 1 μg/L.
The significance is not only technical. Once a country demonstrates that sub-1 µg/L is achievable at utility scale, the guideline value itself becomes a policy question rather than a technical ceiling, and that is the conversation the 8th International Congress was convened to have.
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