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tapwater
England and Wales average 9.0

Tap water in CF46, Merthyr TydfilSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 459 samples, 23 substances, latest on 18 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 CF46 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. 20 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%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%Chromium: 0.001 mg/L, 2% of the 0.05 mg/L limitChromium2%Manganese: 0.0013 mg/L, 3% of the 0.05 mg/L limitManganese3%Boron: 0.028 mg/L, 3% of the 1 mg/L limitBoron3%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%Bromate: 0.00046 mg/L, 5% of the 0.01 mg/L limitBromate5%Nitrate: 2.61 mg/L, 5% of the 50 mg/L limitNitrate5%Aluminium: 0.012 mg/L, 6% of the 0.2 mg/L limitAluminium6%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%Iron: 0.025 mg/L, 13% of the 0.2 mg/L limitIron13%Trihalomethanes: 0.016 mg/L, 16% of the 0.1 mg/L limitTrihalomethanes16%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%
  1. Colour23%
  2. Trihalomethanes16%
  3. Iron13%
  4. Nitrite11%
  5. Fluoride7%
  6. Turbidity7%
  7. Aluminium6%
  8. Nitrate5%
  9. Bromate5%
  10. Mercury4%
  11. Nickel3%
  12. Copper3%
  13. Boron3%
  14. Manganese3%
  15. Chromium2%
  16. Arsenic2%
  17. Lead2%
  18. Antimony<1%
  19. Selenium<1%
  20. Cadmium<1%
  • Coliform Bacteria none found
  • E. coli none found
  • Conductivity 96 µS/cm
All 23 results as a table
SubstanceResultLegal limitShare of limit
Arsenic0.00017 mg/L0.01 mg/L
2%
Copper0.058 mg/L2 mg/L
3%
Manganese0.0013 mg/L0.05 mg/L
3%
Aluminium0.012 mg/L0.2 mg/L
6%
Coliform Bacteria0 count/100mlMust be zeroNone found
Fluoride0.11 mg/L1.5 mg/L
7%
Iron0.025 mg/L0.2 mg/L
13%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Turbidity0.27 NTU4 NTU
7%
Nitrite0.056 mg/L0.5 mg/L
11%
E. coli0 count/100mlMust be zeroNone found
Nitrate2.61 mg/L50 mg/L
5%
Bromate0.00046 mg/L0.01 mg/L
5%
Trihalomethanes0.016 mg/L0.1 mg/L
16%
Boron0.028 mg/L1 mg/L
3%
Conductivity96 µS/cmNo legal limit–
Selenium0.00023 mg/L0.04 mg/L
<1%
Mercury0.000042 mg/L0.001 mg/L
4%
Nickel0.00059 mg/L0.02 mg/L
3%
Antimony0.000047 mg/L0.005 mg/L
<1%
Chromium0.001 mg/L0.05 mg/L
2%
Lead0.00016 mg/L0.01 mg/L
2%

CF46 in short

Tap water in CF46 (Merthyr Tydfil) is supplied by Dŵr Cymru Welsh Water in the Merthyr Tydfil Central zone and scores 9.6 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 18 December 2024.

  • The cleanest tap water of the 3 areas tested in Merthyr TydfilCF46 scores 9.6 out of 10, ahead of CF47 in second place on 9.5.
  • 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

CF479.5 out of 10CF489.5 out of 10

Questions about CF46 water

Is CF46 tap water safe to drink?

Based on the latest tests, CF46 (Merthyr Tydfil) water scores 9.6/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in CF46 water?

We tested 23 contaminants in CF46 water. None exceeded recommended safe levels.

Who supplies water in CF46?

CF46 (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 CF46?

CF46 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 CF46 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CF46, 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.

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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