According to TapWater.uk's analysis, Swansea scores 9.6/10 for drinking water quality in 2026. Water is supplied by Dŵr Cymru Welsh Water and has been tested for 23 contaminants across 7 postcode districts.
9.6 / 10
7 areas tested · 0 flagged · UK average 9.0
Yes, Swansea tap water is safe to drink. Based on 7 areas tested, Swansea has an average water quality score of 9.6/10 (above the UK average of 9.0/10). No contaminants were found above recommended levels. Water is supplied by Dŵr Cymru Welsh Water. Dŵr Cymru Welsh Water supplies Swansea from reservoirs in the Brecon Beacons and upper Swansea Valley.
All postcode districts in Swansea, ranked by water quality score.
Taste, chlorine and hardness bother people even where the water passes its tests. These are the three fixes our readers pick most: a jug for drinking water, a shower filter, and a reverse osmosis unit that needs no plumbing. Check your own postcode above to see which one your water needs.
The jug for cleaner drinking water
ZeroWater 12-Cup Ready-Pour
Jug Filter · NSF/ANSI 53, NSF/ANSI 401
Typical price
£40approx.
Affiliate link: we may earn a commission at no extra cost to you.
For dry skin and hair after a shower
Jolie Filtered Showerhead
Shower Filter
Typical price
£85approx.
Affiliate link: we may earn a commission at no extra cost to you.
Reverse osmosis without a plumber
Osmio Zero 2.0 Countertop RO
Reverse Osmosis
Typical price
£495approx.
Affiliate link: we may earn a commission at no extra cost to you.
Affiliate link: we may earn a commission at no extra cost to you. How recommendations are funded
Yes, Swansea tap water is generally safe to drink. Across 7 areas tested, the average water quality score is 9.6/10. Dŵr Cymru Welsh Water supplies Swansea from reservoirs in the Brecon Beacons and upper Swansea Valley.
Yes, you can drink tap water in Swansea. It is regulated to UK drinking water standards, and across 7 tested areas the average water quality score is 9.6/10. Enter your postcode for the readings in your exact area.
No contaminants were flagged above recommended levels across Swansea. All tested areas passed on the parameters measured.
Hardness data is not yet available for Swansea. Enter your postcode for detailed water quality data.
The areas with the best water quality in Swansea are SA1 (9.6/10), SA3 (9.6/10), SA4 (9.6/10).
Water in Swansea is supplied by Dŵr Cymru Welsh Water. Dŵr Cymru Welsh Water supplies Swansea from reservoirs in the Brecon Beacons and upper Swansea Valley.
No PFAS (forever chemicals) have been detected in any of the 7 areas tested in Swansea.
Free live water quality widget for SA1: paste these two lines anywhere on your page. It stays up to date by itself and credits TapWater.uk automatically.
<div data-tapwater-postcode="SA1"></div>
<script src="https://www.tapwater.uk/widget.js" async></script>Get a detailed water quality report for your exact area in Swansea.
Based on water quality data from 7 postcode districts in Swansea. Data from your water company via the Stream Water Data Portal and the Environment Agency. See our methodology for how scores are calculated.