7. United Kingdom
United Kingdom has one of the highest standards when it comes to sustaining their tap water system. United Kingdom has their policy and regulations when it comes to delivering the water to residences in the country. The Environment Agency and Drinking Water Inspectorate is responsible for controlling the nature of their drinking water. The country makes sure that they only implement their water production from the standards that are based on EU drinking water directive and on the advice of World Health Organization too.
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