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tapwater
England and Wales average 9.0

Tap water in CH8, FlintshireSafe to drink.Moderately soft.

Supplied by Dŵr Cymru Welsh Water. 901 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

9.4 / 10

The tank is as full as the score. The specks are the minerals that make water hard.

What to do about it

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Basic chlorine and taste improvement on a budget

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What's in a glass of CH8 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 72% of it. 19 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%Chromium: 0.00012 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%Manganese: 0.00068 mg/L, 1% of the 0.05 mg/L limitManganese1%Arsenic: 0.00014 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%Nickel: 0.00059 mg/L, 3% of the 0.02 mg/L limitNickel3%Aluminium: 0.0081 mg/L, 4% of the 0.2 mg/L limitAluminium4%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: 0.012 mg/L, 6% of the 0.2 mg/L limitIron6%Turbidity: 0.27 NTU, 7% of the 4 NTU limitTurbidity7%Fluoride: 0.11 mg/L, 7% of the 1.5 mg/L limitFluoride7%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: 0.072 mg/L, 72% of the 0.1 mg/L limitTrihalomethanes72%
  1. Trihalomethanes72%
  2. Colour23%
  3. Nitrite11%
  4. Fluoride7%
  5. Turbidity7%
  6. Iron6%
  7. Nitrate5%
  8. Mercury4%
  9. Aluminium4%
  10. Nickel3%
  11. Copper3%
  12. Boron3%
  13. Lead2%
  14. Arsenic1%
  15. Manganese1%
  16. Selenium<1%
  17. Antimony<1%
  18. Cadmium<1%
  19. Chromium<1%
  20. Bromate<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 240 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
Manganese0.00068 mg/L0.05 mg/L
1%
Conductivity240 µS/cmNo legal limit–
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Aluminium0.0081 mg/L0.2 mg/L
4%
Turbidity0.27 NTU4 NTU
7%
Iron0.012 mg/L0.2 mg/L
6%
Trihalomethanes0.072 mg/L0.1 mg/L
72%
Boron0.028 mg/L1 mg/L
3%
Antimony0.000028 mg/L0.005 mg/L
<1%
Nickel0.00059 mg/L0.02 mg/L
3%
Mercury0.000042 mg/L0.001 mg/L
4%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Selenium0.00023 mg/L0.04 mg/L
<1%
Lead0.00016 mg/L0.01 mg/L
2%
Chromium0.00012 mg/L0.05 mg/L
<1%
Fluoride0.11 mg/L1.5 mg/L
7%
Arsenic0.00014 mg/L0.01 mg/L
1%
Copper0.058 mg/L2 mg/L
3%
Nitrite0.056 mg/L0.5 mg/L
11%
Nitrate2.61 mg/L50 mg/L
5%
Bromate3.1e-7 mg/L0.01 mg/L
<1%

95mg of limescale minerals in every litre, typical for the CH area. CH8 has no reading of its own.

Soft water. Kind to kettles, boilers and skin

You will not need a softener here, and you will use less soap and detergent than most of England.

Soft400 mg/L
Within 10 km

3

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was PFBS at 0.0012 µg/L, at Caldy Golf Club Routine Groundwater Sample, 9.7 km away, in September 2023. These are river and borehole samples, not tests of your tap water.

Every PFAS sample around Liverpool · Which filters remove PFAS · PFAS explained

CH8 in short

Tap water in CH8 (Flintshire) is supplied by Dŵr Cymru Welsh Water in the Flintshire Central zone and scores 9.4 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.

  • Trihalomethanes is the reading closest to its limit, at 72% of the 0.1 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
  • 4th cleanest of 5 areas tested in Flintshire1 area in Flintshire scored lower. The best is CH4 on 10.
  • PFAS found at 1 monitoring site within 10 kmThose are river and groundwater samples, not tap water. The highest was PFBS about 9.7 km away. What was measured

Next door

CH410.0 out of 10 · 95 mg/LCH59.4 out of 10 · 95 mg/LCH69.3 out of 10 · 95 mg/LCH79.4 out of 10 · 95 mg/L

Questions about CH8 water

Is CH8 tap water safe to drink?

Based on the latest tests, CH8 (Flintshire) water scores 9.4/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in CH8 water?

We tested 23 contaminants in CH8 water. None exceeded recommended safe levels. PFAS (forever chemicals) were also measured in rivers and groundwater within 10 km, though not in the tap-water tests themselves.

Who supplies water in CH8?

CH8 (Flintshire) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.

Is CH8 water hard or soft?

No hardness reading has been published for CH8 itself. Across the CH postcode area the typical value is 95 mg/L CaCO3, which is classified as moderately soft. This is a moderate hardness level.

Should I use a water filter in CH8?

CH8 water scored 9.4/10 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 CH8 water?

The tap-water tests we hold for CH8 do not include a PFAS result. Environment Agency monitoring found PFAS in 3 river and groundwater samples from 1 sites within 10 km of CH8, the highest being PFBS at 0.0012 µg/L about 9.7 km away. These are environmental samples, not tests of tap water. The UK currently has no legal limit for PFAS in drinking water; the Drinking Water Inspectorate uses a 0.1 µg/L guideline for individual compounds. Reverse osmosis filters can reduce PFAS levels.

Keep reading

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

River and groundwater readings near CH8

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
Ammonia1.7 mg/L0.5 mg/L
pH7.2 pHNone
Temperature12.6 °CNone
Conductivity842 µS/cmNone
Cadmium0.000024 mg/L0.005 mg/L
Nitrate4.1 mg/L50 mg/L
Nitrite0.22 mg/L0.5 mg/L
Hardness (as CaCO3)362 mg/LNone
Fluoride0.13 mg/L1.5 mg/L
Phosphate0.18 mg/LNone
Lead0.00001 mg/L0.01 mg/L
Zinc0.086 mg/LNone
Nickel0.00084 mg/L0.02 mg/L
Manganese0.0006 mg/L0.05 mg/L
Copper0.00004 mg/L2 mg/L

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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