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Tim Foster gravatar image
RedR

Quick note on WHO water quality guidelines. They are just that guidelines, not standards. Calling them standards was a mistake WHO recognised in the 1980s I believe. Setting standards is a national prerogative and responsibility; having one set of international standards would be unrealistic. The guidelines give supporting research etc. in order to help governments to set their own standards; hopefully based on major health risks in their country and attainable standards which could possibly be implemented, enforced and respected. Interesting to compare with the Sphere approach....