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 70 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
Nitrite51 areas
Coliform Bacteria16 areas
E. coli2 areas
Lead1 area
Full city reports
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