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tapwater
England and Wales average 9.0

Tap water in LL18, DenbighshireSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 839 samples, 23 substances, latest on 22 December 2024. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.0 / 10

The tank is as full as the score.

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What's in a glass of LL18 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.

Nitrite came closest to a limit, at 40% of it. 17 of 20 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitBromate: 3.1e-7 mg/L, <1% of the 0.01 mg/L limitBromate<1%Cadmium: 0.000025 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Antimony: 0.000028 mg/L, <1% of the 0.005 mg/L limitAntimony<1%Selenium: 0.00023 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Manganese: 0.00068 mg/L, 1% of the 0.05 mg/L limitManganese1%Iron: 0.004 mg/L, 2% of the 0.2 mg/L limitIron2%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%Copper: 0.058 mg/L, 3% of the 2 mg/L limitCopper3%Chromium: 0.0015 mg/L, 3% of the 0.05 mg/L limitChromium3%Arsenic: 0.0004 mg/L, 4% of the 0.01 mg/L limitArsenic4%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Trihalomethanes: 0.014 mg/L, 14% of the 0.1 mg/L limitTrihalomethanes14%Nitrate: 9.56 mg/L, 19% of the 50 mg/L limitNitrate19%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Lead: 0.0031 mg/L, 31% of the 0.01 mg/L limitLead31%Nickel: 0.0077 mg/L, 39% of the 0.02 mg/L limitNickel39%Nitrite: 0.2 mg/L, 40% of the 0.5 mg/L limitNitrite40%
  1. Nitrite40%
  2. Nickel39%
  3. Lead31%
  4. Colour23%
  5. Nitrate19%
  6. Trihalomethanes14%
  7. Fluoride7%
  8. Turbidity7%
  9. Mercury4%
  10. Arsenic4%
  11. Chromium3%
  12. Copper3%
  13. Boron3%
  14. Aluminium3%
  15. Iron2%
  16. Manganese1%
  17. Selenium<1%
  18. Antimony<1%
  19. Cadmium<1%
  20. Bromate<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 320 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
Conductivity320 µS/cmNo legal limit–
Aluminium0.005 mg/L0.2 mg/L
3%
Iron0.004 mg/L0.2 mg/L
2%
Turbidity0.27 NTU4 NTU
7%
Manganese0.00068 mg/L0.05 mg/L
1%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Selenium0.00023 mg/L0.04 mg/L
<1%
Chromium0.0015 mg/L0.05 mg/L
3%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Lead0.0031 mg/L0.01 mg/L
31%
Nickel0.0077 mg/L0.02 mg/L
39%
Mercury0.000042 mg/L0.001 mg/L
4%
Antimony0.000028 mg/L0.005 mg/L
<1%
Arsenic0.0004 mg/L0.01 mg/L
4%
Fluoride0.11 mg/L1.5 mg/L
7%
Copper0.058 mg/L2 mg/L
3%
Nitrate9.56 mg/L50 mg/L
19%
Nitrite0.2 mg/L0.5 mg/L
40%
Boron0.028 mg/L1 mg/L
3%
Trihalomethanes0.014 mg/L0.1 mg/L
14%
Bromate3.1e-7 mg/L0.01 mg/L
<1%

LL18 in short

Tap water in LL18 (Denbighshire) is supplied by Dŵr Cymru Welsh Water in the Denbighshire Central zone and scores 9.0 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 22 December 2024.

  • The lowest score of the 7 areas tested in DenbighshireLL18 scores 9 out of 10. The best in Denbighshire, LL19, scores 9.5.
  • Every one of the 6 neighbouring districts scores higherLL19 next door scores 9.5, against 9 here. Supply zones, not distance, explain the gap. See LL19
  • Nitrite is the reading closest to its limit, at 40% of the 0.5 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading

Next door

LL159.3 out of 10LL169.1 out of 10LL179.4 out of 10LL199.5 out of 10LL209.5 out of 10LL219.4 out of 10

Questions about LL18 water

Is LL18 tap water safe to drink?

Based on the latest tests, LL18 (Denbighshire) water scores 9/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in LL18 water?

We tested 23 contaminants in LL18 water. None exceeded recommended safe levels.

Who supplies water in LL18?

LL18 (Denbighshire) 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 LL18?

LL18 water scored 9/10 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 LL18 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for LL18, 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