Cardiff vs London
Water quality comparison
According to TapWater.uk, Cardiff scores 9.5/10 and London scores 8.4/10 for drinking water quality. Cardiff has the better water.
Cardiff has better water quality by 1.1 points
Key differences
Safety score
Cardiff scores 1.1 points higher than London.
Contaminants flagged
London has 108 issues flagged vs 0 in Cardiff.
Water supplier
Cardiff is supplied by Dŵr Cymru Welsh Water, while London uses Thames Water.
Top concerns by city
Cardiff
No contaminants flagged
London
Nitrite78 areas
Coliform Bacteria22 areas
E. coli5 areas
Lead2 areas
Full city reports
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