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tapwater
England and Wales average 9.0

Tap water in CF47, Merthyr TydfilSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 493 samples, 23 substances, latest on 20 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.

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What's in a glass of CF47 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 29% of it. 19 of 20 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.0001 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: 0.000065 mg/L, 1% of the 0.005 mg/L limitAntimony1%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: 0.00018 mg/L, 2% of the 0.01 mg/L limitArsenic2%Iron: 0.004 mg/L, 2% of the 0.2 mg/L limitIron2%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%Copper: 0.062 mg/L, 3% of the 2 mg/L limitCopper3%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Aluminium: 0.009 mg/L, 5% of the 0.2 mg/L limitAluminium5%Nitrate: 2.61 mg/L, 5% of the 50 mg/L limitNitrate5%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Bromate: 0.00085 mg/L, 9% of the 0.01 mg/L limitBromate9%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: 0.029 mg/L, 29% of the 0.1 mg/L limitTrihalomethanes29%
  1. Trihalomethanes29%
  2. Colour23%
  3. Nitrite11%
  4. Bromate9%
  5. Fluoride7%
  6. Turbidity7%
  7. Nitrate5%
  8. Aluminium5%
  9. Mercury4%
  10. Copper3%
  11. Nickel3%
  12. Boron3%
  13. Iron2%
  14. Arsenic2%
  15. Lead2%
  16. Manganese1%
  17. Antimony1%
  18. Selenium<1%
  19. Cadmium<1%
  20. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 100 µS/cm
All 23 results as a table
SubstanceResultLegal limitShare of limit
E. coli0 count/100mlMust be zeroNone found
Turbidity0.27 NTU4 NTU
7%
Manganese0.00068 mg/L0.05 mg/L
1%
Coliform Bacteria0 count/100mlMust be zeroNone found
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Aluminium0.009 mg/L0.2 mg/L
5%
Conductivity100 µS/cmNo legal limit–
Iron0.004 mg/L0.2 mg/L
2%
Bromate0.00085 mg/L0.01 mg/L
9%
Trihalomethanes0.029 mg/L0.1 mg/L
29%
Boron0.028 mg/L1 mg/L
3%
Nickel0.00059 mg/L0.02 mg/L
3%
Antimony0.000065 mg/L0.005 mg/L
1%
Lead0.00016 mg/L0.01 mg/L
2%
Mercury0.000042 mg/L0.001 mg/L
4%
Selenium0.00023 mg/L0.04 mg/L
<1%
Chromium0.0001 mg/L0.05 mg/L
<1%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Copper0.062 mg/L2 mg/L
3%
Arsenic0.00018 mg/L0.01 mg/L
2%
Fluoride0.11 mg/L1.5 mg/L
7%
Nitrite0.056 mg/L0.5 mg/L
11%
Nitrate2.61 mg/L50 mg/L
5%

CF47 in short

Tap water in CF47 (Merthyr Tydfil) is supplied by Dŵr Cymru Welsh Water in the Merthyr Tydfil 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 20 December 2024.

  • 2nd cleanest of 3 areas tested in Merthyr TydfilSquarely mid-table for Merthyr Tydfil, between CF46 on 9.6 and CF48 on 9.5.
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 29% of the 0.1 mg/L maximum. See every reading
  • Right on the national average of 9 out of 10Most of the country's tested districts land within half a point of CF47. Compare every area

Next door

CF489.5 out of 10CF469.6 out of 10

Questions about CF47 water

Is CF47 tap water safe to drink?

Based on the latest tests, CF47 (Merthyr Tydfil) 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 CF47 water?

We tested 23 contaminants in CF47 water. None exceeded recommended safe levels.

Who supplies water in CF47?

CF47 (Merthyr Tydfil) 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 CF47?

CF47 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 CF47 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CF47, 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

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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