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tapwater
England and Wales average 9.0

Tap water in LL54, GwyneddSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 500 samples, 22 substances, latest on 15 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.

What to do about it

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What's in a glass of LL54 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 28% of it. 18 of 19 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%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%Arsenic: 0.00011 mg/L, 1% of the 0.01 mg/L limitArsenic1%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%Nitrite: 0.013 mg/L, 3% of the 0.5 mg/L limitNitrite3%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%Iron: 0.0086 mg/L, 4% of the 0.2 mg/L limitIron4%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%Aluminium: 0.028 mg/L, 14% of the 0.2 mg/L limitAluminium14%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Trihalomethanes: 0.028 mg/L, 28% of the 0.1 mg/L limitTrihalomethanes28%
  1. Trihalomethanes28%
  2. Colour23%
  3. Aluminium14%
  4. Fluoride7%
  5. Turbidity7%
  6. Nitrate5%
  7. Iron4%
  8. Mercury4%
  9. Nickel3%
  10. Copper3%
  11. Boron3%
  12. Nitrite3%
  13. Lead2%
  14. Manganese1%
  15. Arsenic1%
  16. Selenium<1%
  17. Antimony<1%
  18. Cadmium<1%
  19. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 48 µS/cm
All 22 results as a table
SubstanceResultLegal limitShare of limit
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Conductivity48 µS/cmNo legal limit–
Aluminium0.028 mg/L0.2 mg/L
14%
Manganese0.00068 mg/L0.05 mg/L
1%
Iron0.0086 mg/L0.2 mg/L
4%
Turbidity0.27 NTU4 NTU
7%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Trihalomethanes0.028 mg/L0.1 mg/L
28%
Boron0.028 mg/L1 mg/L
3%
Antimony0.000028 mg/L0.005 mg/L
<1%
Selenium0.00023 mg/L0.04 mg/L
<1%
Lead0.00016 mg/L0.01 mg/L
2%
Nickel0.00059 mg/L0.02 mg/L
3%
Chromium0.000092 mg/L0.05 mg/L
<1%
Mercury0.000042 mg/L0.001 mg/L
4%
Copper0.058 mg/L2 mg/L
3%
Fluoride0.11 mg/L1.5 mg/L
7%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Arsenic0.00011 mg/L0.01 mg/L
1%
Nitrite0.013 mg/L0.5 mg/L
3%
Nitrate2.61 mg/L50 mg/L
5%

LL54 in short

Tap water in LL54 (Gwynedd) is supplied by Dŵr Cymru Welsh Water in the Gwynedd Central zone and scores 9.6 out of 10, against an England and Wales average of 9.0. None of the 22 tested substances came close to a limit. The latest sample is from 15 December 2024.

  • 16th cleanest of 23 areas tested in Gwynedd7 areas in Gwynedd scored lower. The best is LL35 on 9.7.
  • 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 Trihalomethanes at 28% of the 0.1 mg/L maximum. See every reading

Next door

LL559.6 out of 10LL579.6 out of 10LL239.6 out of 10LL469.6 out of 10LL499.6 out of 10LL389.6 out of 10LL439.7 out of 10LL539.5 out of 10LL479.7 out of 10LL519.5 out of 10

Questions about LL54 water

Is LL54 tap water safe to drink?

Based on the latest tests, LL54 (Gwynedd) water scores 9.6/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in LL54 water?

We tested 22 contaminants in LL54 water. None exceeded recommended safe levels.

Who supplies water in LL54?

LL54 (Gwynedd) 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 LL54?

LL54 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 LL54 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for LL54, 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