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tapwater
England and Wales average 9.0

Tap water in LL23, GwyneddSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 156 samples, 19 substances, latest on 6 November 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 LL23 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. 15 of 16 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.0002 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%Iron: 0.004 mg/L, 2% of the 0.2 mg/L limitIron2%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%Nitrate: 2.61 mg/L, 5% of the 50 mg/L limitNitrate5%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Nitrite: 0.056 mg/L, 11% of the 0.5 mg/L limitNitrite11%Aluminium: 0.023 mg/L, 12% of the 0.2 mg/L limitAluminium12%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. Aluminium12%
  4. Nitrite11%
  5. Turbidity7%
  6. Nitrate5%
  7. Nickel3%
  8. Copper3%
  9. Iron2%
  10. Lead2%
  11. Manganese1%
  12. Arsenic1%
  13. Selenium<1%
  14. Antimony<1%
  15. Cadmium<1%
  16. Chromium<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 110 µS/cm
All 19 results as a table
SubstanceResultLegal limitShare of limit
Copper0.058 mg/L2 mg/L
3%
Manganese0.00068 mg/L0.05 mg/L
1%
Iron0.004 mg/L0.2 mg/L
2%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Arsenic0.00011 mg/L0.01 mg/L
1%
Nitrate2.61 mg/L50 mg/L
5%
Nitrite0.056 mg/L0.5 mg/L
11%
Aluminium0.023 mg/L0.2 mg/L
12%
E. coli0 count/100mlMust be zeroNone found
Turbidity0.27 NTU4 NTU
7%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Coliform Bacteria0 count/100mlMust be zeroNone found
Conductivity110 µS/cmNo legal limit–
Trihalomethanes0.025 mg/L0.1 mg/L
25%
Nickel0.00059 mg/L0.02 mg/L
3%
Selenium0.00023 mg/L0.04 mg/L
<1%
Antimony0.000028 mg/L0.005 mg/L
<1%
Lead0.00016 mg/L0.01 mg/L
2%
Chromium0.0002 mg/L0.05 mg/L
<1%

LL23 in short

Tap water in LL23 (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 19 tested substances came close to a limit. The latest sample is from 6 November 2024.

  • 5th cleanest of 23 areas tested in GwyneddOnly 4 areas in Gwynedd scored higher. 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 25% of the 0.1 mg/L maximum. See every reading

Next door

LL559.6 out of 10LL579.6 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 10LL549.6 out of 10

Questions about LL23 water

Is LL23 tap water safe to drink?

Based on the latest tests, LL23 (Gwynedd) water scores 9.6/10, which is safe. 0 of 19 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in LL23 water?

We tested 19 contaminants in LL23 water. None exceeded recommended safe levels.

Who supplies water in LL23?

LL23 (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 LL23?

LL23 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 LL23 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for LL23, 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