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tapwater
England and Wales average 9.0

Tap water in SA7, SwanseaSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 606 samples, 23 substances, latest on 21 December 2024. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.5 / 10

The tank is as full as the score.

What to do about it

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What's in a glass of SA7 water

Every bubble is a substance the lab measured. The higher it floats, the closer it came to its legal limit, the dashed line at the top.

Trihalomethanes came closest to a limit, at 27% of it. 19 of 20 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitCadmium: 0.000025 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Selenium: 0.00023 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Antimony: 0.000047 mg/L, <1% of the 0.005 mg/L limitAntimony<1%Manganese: 0.00068 mg/L, 1% of the 0.05 mg/L limitManganese1%Lead: 0.00016 mg/L, 2% of the 0.01 mg/L limitLead2%Arsenic: 0.00017 mg/L, 2% of the 0.01 mg/L limitArsenic2%Aluminium: 0.005 mg/L, 3% of the 0.2 mg/L limitAluminium3%Boron: 0.028 mg/L, 3% of the 1 mg/L limitBoron3%Nickel: 0.00059 mg/L, 3% of the 0.02 mg/L limitNickel3%Iron: 0.006 mg/L, 3% of the 0.2 mg/L limitIron3%Chromium: 0.0015 mg/L, 3% of the 0.05 mg/L limitChromium3%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Copper: 0.09 mg/L, 5% of the 2 mg/L limitCopper5%Nitrate: 2.61 mg/L, 5% of the 50 mg/L limitNitrate5%Bromate: 0.00063 mg/L, 6% of the 0.01 mg/L limitBromate6%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Nitrite: 0.056 mg/L, 11% of the 0.5 mg/L limitNitrite11%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Trihalomethanes: 0.027 mg/L, 27% of the 0.1 mg/L limitTrihalomethanes27%
  1. Trihalomethanes27%
  2. Colour23%
  3. Nitrite11%
  4. Fluoride7%
  5. Turbidity7%
  6. Bromate6%
  7. Nitrate5%
  8. Copper5%
  9. Mercury4%
  10. Iron3%
  11. Chromium3%
  12. Nickel3%
  13. Boron3%
  14. Aluminium3%
  15. Arsenic2%
  16. Lead2%
  17. Manganese1%
  18. Antimony<1%
  19. Selenium<1%
  20. Cadmium<1%
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 120 µS/cm
All 23 results as a table
SubstanceResultLegal limitShare of limit
Coliform Bacteria0 count/100mlMust be zeroNone found
Manganese0.00068 mg/L0.05 mg/L
1%
E. coli0 count/100mlMust be zeroNone found
Iron0.006 mg/L0.2 mg/L
3%
Aluminium0.005 mg/L0.2 mg/L
3%
Turbidity0.27 NTU4 NTU
7%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Conductivity120 µS/cmNo legal limit–
Bromate0.00063 mg/L0.01 mg/L
6%
Trihalomethanes0.027 mg/L0.1 mg/L
27%
Boron0.028 mg/L1 mg/L
3%
Selenium0.00023 mg/L0.04 mg/L
<1%
Nickel0.00059 mg/L0.02 mg/L
3%
Lead0.00016 mg/L0.01 mg/L
2%
Antimony0.000047 mg/L0.005 mg/L
<1%
Mercury0.000042 mg/L0.001 mg/L
4%
Chromium0.0015 mg/L0.05 mg/L
3%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Arsenic0.00017 mg/L0.01 mg/L
2%
Nitrite0.056 mg/L0.5 mg/L
11%
Copper0.09 mg/L2 mg/L
5%
Fluoride0.11 mg/L1.5 mg/L
7%
Nitrate2.61 mg/L50 mg/L
5%

SA7 in short

Tap water in SA7 (Swansea) is supplied by Dŵr Cymru Welsh Water in the Swansea Central zone and scores 9.5 out of 10, against an England and Wales average of 9.0. None of the 23 tested substances came close to a limit. The latest sample is from 21 December 2024.

  • The lowest score of the 7 areas tested in SwanseaSA7 scores 9.5 out of 10. The best in Swansea, SA1, scores 9.6. Every area in Swansea
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 27% of the 0.1 mg/L maximum. See every reading
  • Scores higher than 0 of 6 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

SA29.5 out of 10SA19.6 out of 10SA39.6 out of 10SA49.6 out of 10SA59.5 out of 10SA69.6 out of 10

Questions about SA7 water

Is SA7 tap water safe to drink?

Based on the latest tests, SA7 (Swansea) water scores 9.5/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in SA7 water?

We tested 23 contaminants in SA7 water. None exceeded recommended safe levels.

Who supplies water in SA7?

SA7 (Swansea) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.

Should I use a water filter in SA7?

SA7 water scored 9.5/10 with no contaminants above recommended levels. A filter is optional but can improve taste, especially if you notice a chlorine flavour. See our filter recommendations for your area.

Are there PFAS forever chemicals in SA7 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for SA7, and the Environment Agency has no PFAS detections in rivers or groundwater within 10 km of it. That reflects where sampling has happened as much as the water itself.

Keep reading

How to test your waterBest water filtersFilter shower headsWater testing kitsAll of SwanseaUK water rankingsWater hardness checkerWater hardness map

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Source: Dŵr Cymru Welsh Water test results, published through the Stream Water Data Portal; rivers and PFAS from the Environment Agency. Page updated . How we score · Where the data comes from