Tap water in CF30, CardiffToo few tap tests to call it.
Supplied by Dŵr Cymru Welsh Water. 4 samples, 2 substances, latest on 13 November 2024. Only 2 of them have a legal limit to judge against, so treat the score as provisional.
10.0 / 10
The tank is as full as the score.
What to do about it

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What's in a glass of CF30 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.
- Coliform Bacteria none found
- E. coli none found
All 2 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
| E. coli | 0 count/100ml | Must be zero | None found |
CF30 in short
Tap water in CF30 (Cardiff) is supplied by Dŵr Cymru Welsh Water in the Cardiff Central zone and scores 10.0 out of 10, against an England and Wales average of 9.0. None of the 2 tested substances came close to a limit. The latest sample is from 13 November 2024.
- The cleanest tap water of the 9 areas tested in CardiffCF30 scores 10 out of 10, ahead of CF10 in second place on 9.4. Every area in Cardiff
- Scores higher than all 8 neighbouring districtsThe nearest rival is CF10 on 9.4, against 10 here. Compare with CF10
- 1 point above the national average of 9Cleaner than the typical tested district in the UK. Compare every area
Questions about CF30 water
Is CF30 tap water safe to drink?
Based on the latest tests, CF30 (Cardiff) water scores 10/10, which is safe. 0 of 2 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.
What contaminants are in CF30 water?
We tested 2 contaminants in CF30 water. None exceeded recommended safe levels.
Who supplies water in CF30?
CF30 (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 CF30?
CF30 water scored 10/10 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 CF30 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for CF30, 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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