What is the water quality in Cardiff?

No contaminants were flagged above recommended levels across Cardiff. All tested areas passed on the parameters measured.

Is Cardiff water hard or soft?

Hardness data is not yet available for Cardiff. Enter your postcode for detailed water quality data.

Which areas of Cardiff have the best water?

The areas with the best water quality in Cardiff are CF30 (10.0/10), CF72 (9.6/10), CF14 (9.5/10).

Are there PFAS in Cardiff water?

No PFAS (forever chemicals) have been detected in any of the 10 areas tested in Cardiff.

Wales

Is Cardiff tap water safe to drink?

Q: Is Cardiff tap water safe to drink?

Yes, Cardiff tap water is generally safe to drink. Across 10 areas tested, the average water quality score is 9.5/10. Dŵr Cymru Welsh Water supplies Cardiff from reservoirs in the Brecon Beacons and Taff Fawr valley.

Q: Who supplies water in Cardiff?

Water in Cardiff is supplied by Dŵr Cymru Welsh Water. Dŵr Cymru Welsh Water supplies Cardiff from reservoirs in the Brecon Beacons and Taff Fawr valley.

Dŵr Cymru Welsh Water supplies Cardiff from reservoirs in the Brecon Beacons and Taff Fawr valley.

Average score

9.5/10

UK avg: 9.1/10

Areas tested

Issues flagged

PFAS detected

None

Yes, Cardiff tap water is safe to drink. Based on 10 areas tested, Cardiff has an average water quality score of 9.5/10 (above the UK average of 9.1/10). No contaminants were found above recommended levels. Water is supplied by Dŵr Cymru Welsh Water. Dŵr Cymru Welsh Water supplies Cardiff from reservoirs in the Brecon Beacons and Taff Fawr valley.