Nations with best drinking water quality

 I remember reading in a book that in Rome, Italy, the water which we get from the fountains across the city is so pure and clear that even tourists carry the same water in their water cans   !!!!

European countries maintain this much high level of hygiene in drinking water. They are - - - -

1.  United kingdom

2.  Austria 

3.  Switzerland

4.  Greece 

5.  Finland

6.  Norway

7.  Ireland