Skip to main content
tapwater
England and Wales average 9.0

Tap water in LL20, DenbighshireSafe to drink.

Supplied by Dŵr Cymru Welsh Water. 111 samples, 22 substances, latest on 9 November 2024. Everything is inside the legal limit, and nothing comes close to it.

See the filter we recommendSee everything that was tested

9.5 / 10

The tank is as full as the score.

What to do about it

ZeroWater 12-Cup Ready-Pour

ZeroWater 12-Cup Ready-Pour

£40typical price

Households concerned about PFAS and heavy metals

Check price at Amazon (opens in new tab)
Waterdrop 10UA Under Sink

Waterdrop 10UA Under Sink

£70typical price

High-volume under-sink filtration without RO complexity

Check price at Waterdrop (opens in new tab)
BRITA Marella XL + MAXTRA PRO

BRITA Marella XL + MAXTRA PRO

£25typical price

Basic chlorine and taste improvement on a budget

Check price at Amazon (opens in new tab)

We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money

What's in a glass of LL20 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 39% of it. 18 of 19 substances used under a quarter of theirs.

0%25%50%75%limitLegal limitChromium: 0.00011 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%Manganese: 0.0011 mg/L, 2% of the 0.05 mg/L limitManganese2%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%Nitrate: 2.61 mg/L, 5% of the 50 mg/L limitNitrate5%Iron: 0.013 mg/L, 7% of the 0.2 mg/L limitIron7%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%Aluminium: 0.022 mg/L, 11% of the 0.2 mg/L limitAluminium11%Nitrite: 0.056 mg/L, 11% of the 0.5 mg/L limitNitrite11%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Trihalomethanes: 0.039 mg/L, 39% of the 0.1 mg/L limitTrihalomethanes39%
  1. Trihalomethanes39%
  2. Colour23%
  3. Nitrite11%
  4. Aluminium11%
  5. Fluoride7%
  6. Turbidity7%
  7. Iron7%
  8. Nitrate5%
  9. Mercury4%
  10. Nickel3%
  11. Copper3%
  12. Boron3%
  13. Manganese2%
  14. Lead2%
  15. Arsenic1%
  16. Selenium<1%
  17. Antimony<1%
  18. Cadmium<1%
  19. Chromium<1%
  • Conductivity 170 µS/cm
  • E. coli none found
  • Coliform Bacteria none found
All 22 results as a table
SubstanceResultLegal limitShare of limit
Conductivity170 µS/cmNo legal limit–
Aluminium0.022 mg/L0.2 mg/L
11%
Iron0.013 mg/L0.2 mg/L
7%
Manganese0.0011 mg/L0.05 mg/L
2%
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Turbidity0.27 NTU4 NTU
7%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Trihalomethanes0.039 mg/L0.1 mg/L
39%
Boron0.028 mg/L1 mg/L
3%
Mercury0.000042 mg/L0.001 mg/L
4%
Selenium0.00023 mg/L0.04 mg/L
<1%
Nickel0.00059 mg/L0.02 mg/L
3%
Chromium0.00011 mg/L0.05 mg/L
<1%
Lead0.00016 mg/L0.01 mg/L
2%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Antimony0.000028 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%

LL20 in short

Tap water in LL20 (Denbighshire) is supplied by Dŵr Cymru Welsh Water in the Denbighshire Central zone and scores 9.5 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 9 November 2024.

  • 2nd cleanest of 7 areas tested in DenbighshireOnly 1 area in Denbighshire scored higher. The best is LL19 on 9.5.
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 39% of the 0.1 mg/L maximum. See every reading
  • Scores higher than 5 of 6 neighbouring districtsWater here is typical for the immediate area, which usually means the same treatment works and the same supply zone.

Next door

LL189.0 out of 10LL199.5 out of 10LL159.3 out of 10LL169.1 out of 10LL179.4 out of 10LL219.4 out of 10

Questions about LL20 water

Is LL20 tap water safe to drink?

Based on the latest tests, LL20 (Denbighshire) water scores 9.5/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in LL20 water?

We tested 22 contaminants in LL20 water. None exceeded recommended safe levels.

Who supplies water in LL20?

LL20 (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 LL20?

LL20 water scored 9.5/10 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 LL20 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for LL20, 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

How to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map

River and groundwater readings near LL20

Environment Agency samples from rivers, groundwater and reservoirs nearby. Not your tap water. For scale they are shown against drinking water limits; rivers are judged against much stricter environmental standards, and on those every river in England fails for chemicals.

SubstanceReadingDrinking water limit
pH8.38 pHNone
Temperature14.1 °CNone
Conductivity617 µS/cmNone
Nitrate2.8 mg/L50 mg/L
Phosphate0.076 mg/LNone
Dissolved Oxygen9.95 mg/LNone
Nitrite0.025 mg/L0.5 mg/L
Ammonia0.221 mg/L0.5 mg/L

Get alerts for your area

We'll email you when water quality data changes for LL20.

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