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tapwater
England and Wales average 9.0

Tap water in CF37, Rhondda Cynon TafSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 1,485 samples, 23 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

9.5 / 10

The tank is as full as the score.

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What's in a glass of CF37 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 25% 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: 0.000058 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%Aluminium: 0.0053 mg/L, 3% of the 0.2 mg/L limitAluminium3%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%Chromium: 0.0015 mg/L, 3% of the 0.05 mg/L limitChromium3%Bromate: 0.00034 mg/L, 3% of the 0.01 mg/L limitBromate3%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%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%Iron: 0.017 mg/L, 9% of the 0.2 mg/L limitIron9%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: 0.025 mg/L, 25% of the 0.1 mg/L limitTrihalomethanes25%
  1. Trihalomethanes25%
  2. Colour23%
  3. Nitrite11%
  4. Iron9%
  5. Fluoride7%
  6. Turbidity7%
  7. Nitrate5%
  8. Mercury4%
  9. Bromate3%
  10. Chromium3%
  11. Nickel3%
  12. Copper3%
  13. Boron3%
  14. Aluminium3%
  15. Arsenic2%
  16. Lead2%
  17. Manganese1%
  18. Antimony1%
  19. Selenium<1%
  20. Cadmium<1%
  • Conductivity 100 µS/cm
  • E. coli none found
  • Coliform Bacteria none found
All 23 results as a table
SubstanceResultLegal limitShare of limit
Trihalomethanes0.025 mg/L0.1 mg/L
25%
Bromate0.00034 mg/L0.01 mg/L
3%
Conductivity100 µS/cmNo legal limit–
Boron0.028 mg/L1 mg/L
3%
Selenium0.00023 mg/L0.04 mg/L
<1%
Antimony0.000058 mg/L0.005 mg/L
1%
E. coli0 count/100mlMust be zeroNone found
Lead0.00016 mg/L0.01 mg/L
2%
Coliform Bacteria0 count/100mlMust be zeroNone found
Mercury0.000042 mg/L0.001 mg/L
4%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Chromium0.0015 mg/L0.05 mg/L
3%
Arsenic0.00018 mg/L0.01 mg/L
2%
Fluoride0.11 mg/L1.5 mg/L
7%
Nickel0.00059 mg/L0.02 mg/L
3%
Iron0.017 mg/L0.2 mg/L
9%
Aluminium0.0053 mg/L0.2 mg/L
3%
Nitrite0.056 mg/L0.5 mg/L
11%
Manganese0.00068 mg/L0.05 mg/L
1%
Copper0.058 mg/L2 mg/L
3%
Nitrate2.61 mg/L50 mg/L
5%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Turbidity0.27 NTU4 NTU
7%

CF37 in short

Tap water in CF37 (Rhondda Cynon Taf) is supplied by Dŵr Cymru Welsh Water in the Rhondda Cynon Taf 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 23 December 2024.

  • 4th cleanest of 10 areas tested in Rhondda Cynon TafOnly 3 areas in Rhondda Cynon Taf scored higher. The best is CF43 on 9.7.
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 25% of the 0.1 mg/L maximum. See every reading
  • Scores higher than 2 of 9 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

CF409.4 out of 10CF389.5 out of 10CF399.6 out of 10CF419.5 out of 10CF429.4 out of 10CF459.5 out of 10CF729.6 out of 10CF449.5 out of 10CF439.7 out of 10

Questions about CF37 water

Is CF37 tap water safe to drink?

Based on the latest tests, CF37 (Rhondda Cynon Taf) 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 CF37 water?

We tested 23 contaminants in CF37 water. None exceeded recommended safe levels.

Who supplies water in CF37?

CF37 (Rhondda Cynon Taf) 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 CF37?

CF37 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 CF37 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CF37, 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