Who library cataloguing in publication data guidelines for drinking water quality 4th ed 1potable water standards 2water standards 3water quality standards. The who guidelines for drinking water quality promote the protection of public health by advocating for preventive risk management and are the international reference point for the development of national regulations and standards on drinking water. The fourth edition of the world health organizations who guidelines for drinking water quality gdwq builds on over 50 years of guidance by who on drinking water quality which has formed an authoritative basis for the setting of national regulations and standards for water safety in support of public health. Who guidelines for drinking water quality was published in three volumes vol1 recommendations vol 2 health criteria and other supporting information and vol 3 surveillance and control of community supplies
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