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tapwater
England and Wales average 9.0

Tap water in LL31, ConwyIron is over the limit.

Supplied by Dŵr Cymru Welsh Water. 352 samples, 22 substances, latest on 18 December 2024. Iron came in above the legal limit. Everything else passed.

See the filter we recommendSee everything that was tested

9.1 / 10

The tank is as full as the score.

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What's in a glass of LL31 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.

Iron is over its legal limit, at 140% of it.

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%Lead: 0.00016 mg/L, 2% of the 0.01 mg/L limitLead2%Boron: 0.028 mg/L, 3% of the 1 mg/L limitBoron3%Copper: 0.058 mg/L, 3% of the 2 mg/L limitCopper3%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Nitrate: 2.61 mg/L, 5% of the 50 mg/L limitNitrate5%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Nickel: 0.0021 mg/L, 11% of the 0.02 mg/L limitNickel11%Nitrite: 0.056 mg/L, 11% of the 0.5 mg/L limitNitrite11%Aluminium: 0.027 mg/L, 13% of the 0.2 mg/L limitAluminium13%Turbidity: 0.76 NTU, 19% of the 4 NTU limitTurbidity19%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Manganese: 0.018 mg/L, 36% of the 0.05 mg/L limitManganese36%Trihalomethanes: 0.044 mg/L, 44% of the 0.1 mg/L limitTrihalomethanes44%Iron: 0.28 mg/L, 140% of the 0.2 mg/L limitIron140%
  1. Iron140%
  2. Trihalomethanes44%
  3. Manganese36%
  4. Colour23%
  5. Turbidity19%
  6. Aluminium13%
  7. Nitrite11%
  8. Nickel11%
  9. Fluoride7%
  10. Nitrate5%
  11. Mercury4%
  12. Copper3%
  13. Boron3%
  14. Lead2%
  15. Arsenic1%
  16. Selenium<1%
  17. Antimony<1%
  18. Cadmium<1%
  19. Chromium<1%
  • Coliform Bacteria none found
  • Conductivity 85 µS/cm
  • E. coli none found
All 22 results as a table
SubstanceResultLegal limitShare of limit
Iron0.28 mg/L0.2 mg/L
140%
Coliform Bacteria0 count/100mlMust be zeroNone found
Conductivity85 µS/cmNo legal limit–
Manganese0.018 mg/L0.05 mg/L
36%
E. coli0 count/100mlMust be zeroNone found
Turbidity0.76 NTU4 NTU
19%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Aluminium0.027 mg/L0.2 mg/L
13%
Trihalomethanes0.044 mg/L0.1 mg/L
44%
Boron0.028 mg/L1 mg/L
3%
Lead0.00016 mg/L0.01 mg/L
2%
Nickel0.0021 mg/L0.02 mg/L
11%
Selenium0.00023 mg/L0.04 mg/L
<1%
Chromium0.0002 mg/L0.05 mg/L
<1%
Mercury0.000042 mg/L0.001 mg/L
4%
Antimony0.000028 mg/L0.005 mg/L
<1%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Arsenic0.00011 mg/L0.01 mg/L
1%
Fluoride0.11 mg/L1.5 mg/L
7%
Copper0.058 mg/L2 mg/L
3%
Nitrite0.056 mg/L0.5 mg/L
11%
Nitrate2.61 mg/L50 mg/L
5%

LL31 in short

Tap water in LL31 (Conwy) is supplied by Dŵr Cymru Welsh Water in the Conwy Central zone and scores 9.1 out of 10, against an England and Wales average of 9.0. 1 of 22 tested substances was close to or over a limit. The latest sample is from 18 December 2024.

  • Iron was measured at 0.28 mg/L, 40% over the UK limitIt is the only one of 22 tested substances to go over its limit. See the full results
  • The lowest score of the 12 areas tested in ConwyLL31 scores 9.1 out of 10. The best in Conwy, LL32, scores 9.7.
  • Scores higher than 0 of 10 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

LL229.6 out of 10LL249.2 out of 10LL339.6 out of 10LL279.2 out of 10LL289.5 out of 10LL349.6 out of 10LL299.5 out of 10LL329.7 out of 10LL269.6 out of 10LL309.1 out of 10

Questions about LL31 water

Is LL31 tap water safe to drink?

Based on the latest tests, LL31 (Conwy) water scores 9.1/10, which is safe. 1 of 22 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in LL31 water?

We tested 22 contaminants in LL31 water. 1 were flagged, including Iron.

Who supplies water in LL31?

LL31 (Conwy) 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 LL31?

With 1 contaminant above recommended levels in LL31, a water filter could help. A filter jug or under-sink filter can reduce most common contaminants. See our filter recommendations for your area.

Are there PFAS forever chemicals in LL31 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for LL31, 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