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tapwater
England and Wales average 9.0

Tap water in SA4, SwanseaSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 1,239 samples, 22 substances, latest on 23 December 2024. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.6 / 10

The tank is as full as the score.

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What's in a glass of SA4 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.

Colour came closest to a limit, at 23% of it. 19 of 19 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.000094 mg/L, <1% of the 0.05 mg/L limitChromium<1%Cadmium: 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: 0.00004 mg/L, <1% of the 0.005 mg/L limitAntimony<1%Arsenic: 0.00011 mg/L, 1% of the 0.01 mg/L limitArsenic1%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%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%Iron: 0.0057 mg/L, 3% of the 0.2 mg/L limitIron3%Copper: 0.058 mg/L, 3% of the 2 mg/L limitCopper3%Nickel: 0.00059 mg/L, 3% of the 0.02 mg/L limitNickel3%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Nitrate: 3.5 mg/L, 7% of the 50 mg/L limitNitrate7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Nitrite: 0.074 mg/L, 15% of the 0.5 mg/L limitNitrite15%Trihalomethanes: 0.017 mg/L, 17% of the 0.1 mg/L limitTrihalomethanes17%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%
  1. Colour23%
  2. Trihalomethanes17%
  3. Nitrite15%
  4. Fluoride7%
  5. Nitrate7%
  6. Turbidity7%
  7. Mercury4%
  8. Nickel3%
  9. Copper3%
  10. Iron3%
  11. Boron3%
  12. Aluminium3%
  13. Lead2%
  14. Manganese1%
  15. Arsenic1%
  16. Antimony<1%
  17. Selenium<1%
  18. Cadmium<1%
  19. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 140 µS/cm
All 22 results as a table
SubstanceResultLegal limitShare of limit
Nitrite0.074 mg/L0.5 mg/L
15%
E. coli0 count/100mlMust be zeroNone found
Nitrate3.5 mg/L50 mg/L
7%
Turbidity0.27 NTU4 NTU
7%
Coliform Bacteria0 count/100mlMust be zeroNone found
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Conductivity140 µS/cmNo legal limit–
Manganese0.00068 mg/L0.05 mg/L
1%
Iron0.0057 mg/L0.2 mg/L
3%
Aluminium0.005 mg/L0.2 mg/L
3%
Trihalomethanes0.017 mg/L0.1 mg/L
17%
Selenium0.00023 mg/L0.04 mg/L
<1%
Boron0.028 mg/L1 mg/L
3%
Antimony0.00004 mg/L0.005 mg/L
<1%
Lead0.00016 mg/L0.01 mg/L
2%
Copper0.058 mg/L2 mg/L
3%
Nickel0.00059 mg/L0.02 mg/L
3%
Chromium0.000094 mg/L0.05 mg/L
<1%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Arsenic0.00011 mg/L0.01 mg/L
1%
Mercury0.000042 mg/L0.001 mg/L
4%
Fluoride0.11 mg/L1.5 mg/L
7%

SA4 in short

Tap water in SA4 (Swansea) is supplied by Dŵr Cymru Welsh Water in the Swansea Central zone and scores 9.6 out of 10, against an England and Wales average of 9.0. None of the 22 tested substances came close to a limit. The latest sample is from 23 December 2024.

  • 3rd cleanest of 7 areas tested in SwanseaOnly 2 areas in Swansea scored higher. The best is SA1 on 9.6. Every area in Swansea
  • 0.6 points above the national average of 9Cleaner than the typical tested district in the UK. Compare every area
  • Nothing tested came within 40% of its legal limitThe highest was Colour at 23% of the 20 mg/L Pt/Co maximum. See every reading

Next door

SA29.5 out of 10SA19.6 out of 10SA39.6 out of 10SA59.5 out of 10SA69.6 out of 10SA79.5 out of 10

Questions about SA4 water

Is SA4 tap water safe to drink?

Based on the latest tests, SA4 (Swansea) water scores 9.6/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in SA4 water?

We tested 22 contaminants in SA4 water. None exceeded recommended safe levels.

Who supplies water in SA4?

SA4 (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 SA4?

SA4 water scored 9.6/10 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 SA4 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for SA4, 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