Skip to main content
tapwater
England and Wales average 9.0

Tap water in CF24, CardiffSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 491 samples, 23 substances, latest on 30 December 2024. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.3 / 10

The tank is as full as the score.

What to do about it

ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

£40typical price

Households concerned about PFAS and heavy metals

Check price at Amazon (opens in new tab)
Waterdrop 10UA Under Sink

Waterdrop 10UA Under Sink

£70typical price

High-volume under-sink filtration without RO complexity

Check price at Waterdrop (opens in new tab)
BRITA Marella XL + MAXTRA PRO

BRITA Marella XL + MAXTRA PRO

£25typical price

Basic chlorine and taste improvement on a budget

Check price at Amazon (opens in new tab)

We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money

What's in a glass of CF24 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 41% of it. 18 of 20 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.000092 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%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: 0.00016 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%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Copper: 0.11 mg/L, 6% of the 2 mg/L limitCopper6%Iron: 0.013 mg/L, 7% of the 0.2 mg/L limitIron7%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Bromate: 0.00078 mg/L, 8% of the 0.01 mg/L limitBromate8%Nitrate: 6.37 mg/L, 13% of the 50 mg/L limitNitrate13%Nickel: 0.0027 mg/L, 14% of the 0.02 mg/L limitNickel14%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Nitrite: 0.13 mg/L, 26% of the 0.5 mg/L limitNitrite26%Trihalomethanes: 0.041 mg/L, 41% of the 0.1 mg/L limitTrihalomethanes41%
  1. Trihalomethanes41%
  2. Nitrite26%
  3. Colour23%
  4. Nickel14%
  5. Nitrate13%
  6. Bromate8%
  7. Fluoride7%
  8. Turbidity7%
  9. Iron7%
  10. Copper6%
  11. Mercury4%
  12. Boron3%
  13. Aluminium3%
  14. Lead2%
  15. Arsenic2%
  16. Manganese1%
  17. Antimony<1%
  18. Selenium<1%
  19. Cadmium<1%
  20. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 270 µS/cm
All 23 results as a table
SubstanceResultLegal limitShare of limit
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Manganese0.00068 mg/L0.05 mg/L
1%
Turbidity0.27 NTU4 NTU
7%
Aluminium0.005 mg/L0.2 mg/L
3%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Iron0.013 mg/L0.2 mg/L
7%
Conductivity270 µS/cmNo legal limit–
Bromate0.00078 mg/L0.01 mg/L
8%
Trihalomethanes0.041 mg/L0.1 mg/L
41%
Boron0.028 mg/L1 mg/L
3%
Lead0.00016 mg/L0.01 mg/L
2%
Selenium0.00023 mg/L0.04 mg/L
<1%
Antimony0.00004 mg/L0.005 mg/L
<1%
Nickel0.0027 mg/L0.02 mg/L
14%
Mercury0.000042 mg/L0.001 mg/L
4%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Fluoride0.11 mg/L1.5 mg/L
7%
Arsenic0.00016 mg/L0.01 mg/L
2%
Copper0.11 mg/L2 mg/L
6%
Chromium0.000092 mg/L0.05 mg/L
<1%
Nitrite0.13 mg/L0.5 mg/L
26%
Nitrate6.37 mg/L50 mg/L
13%

CF24 in short

Tap water in CF24 (Cardiff) is supplied by Dŵr Cymru Welsh Water in the Cardiff Central zone and scores 9.3 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 30 December 2024.

  • The lowest score of the 9 areas tested in CardiffCF24 scores 9.3 out of 10. The best in Cardiff, CF30, scores 10. Every area in Cardiff
  • Every one of the 8 neighbouring districts scores higherCF30 next door scores 10, against 9.3 here. Supply zones, not distance, explain the gap. See CF30
  • Trihalomethanes is the reading closest to its limit, at 41% of the 0.1 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading

Next door

CF109.4 out of 10CF119.4 out of 10CF149.4 out of 10CF59.4 out of 10CF239.4 out of 10CF3010.0 out of 10CF159.4 out of 10CF39.4 out of 10

Questions about CF24 water

Is CF24 tap water safe to drink?

Based on the latest tests, CF24 (Cardiff) water scores 9.3/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in CF24 water?

We tested 23 contaminants in CF24 water. None exceeded recommended safe levels.

Who supplies water in CF24?

CF24 (Cardiff) 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 CF24?

CF24 water scored 9.3/10 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 CF24 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CF24, 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 CardiffUK water rankingsWater hardness checkerWater hardness map

Get alerts for your area

We'll email you when water quality data changes for CF24.

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