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tapwater
England and Wales average 9.0

Tap water in CH6, FlintshireSafe to drink.Moderately soft.

Supplied by Dŵr Cymru Welsh Water. 818 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

9.3 / 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 CH6 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 44% of it. 18 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%Cadmium: 0.000025 mg/L, <1% of the 0.005 mg/L limitCadmium<1%Selenium: 0.00023 mg/L, <1% of the 0.04 mg/L limitSelenium<1%Arsenic: 0.00016 mg/L, 2% of the 0.01 mg/L limitArsenic2%Lead: 0.00016 mg/L, 2% of the 0.01 mg/L limitLead2%Manganese: 0.001 mg/L, 2% of the 0.05 mg/L limitManganese2%Antimony: 0.0001 mg/L, 2% of the 0.005 mg/L limitAntimony2%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%Chromium: 0.0015 mg/L, 3% of the 0.05 mg/L limitChromium3%Mercury: 0.000042 mg/L, 4% of the 0.001 mg/L limitMercury4%Aluminium: 0.011 mg/L, 5% of the 0.2 mg/L limitAluminium5%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%Nitrate: 8.94 mg/L, 18% of the 50 mg/L limitNitrate18%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Nitrite: 0.18 mg/L, 36% of the 0.5 mg/L limitNitrite36%Trihalomethanes: 0.044 mg/L, 44% of the 0.1 mg/L limitTrihalomethanes44%
  1. Trihalomethanes44%
  2. Nitrite36%
  3. Colour23%
  4. Nitrate18%
  5. Fluoride7%
  6. Turbidity7%
  7. Iron6%
  8. Aluminium5%
  9. Mercury4%
  10. Chromium3%
  11. Nickel3%
  12. Copper3%
  13. Boron3%
  14. Manganese2%
  15. Antimony2%
  16. Arsenic2%
  17. Lead2%
  18. Selenium<1%
  19. Cadmium<1%
  20. Bromate<1%
  • E. coli none found
  • Coliform Bacteria none found
  • Conductivity 260 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
Turbidity0.27 NTU4 NTU
7%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Conductivity260 µS/cmNo legal limit–
Iron0.012 mg/L0.2 mg/L
6%
Manganese0.001 mg/L0.05 mg/L
2%
Aluminium0.011 mg/L0.2 mg/L
5%
Chromium0.0015 mg/L0.05 mg/L
3%
Cadmium0.000025 mg/L0.005 mg/L
<1%
Arsenic0.00016 mg/L0.01 mg/L
2%
Fluoride0.11 mg/L1.5 mg/L
7%
Copper0.058 mg/L2 mg/L
3%
Nitrate8.94 mg/L50 mg/L
18%
Nitrite0.18 mg/L0.5 mg/L
36%
Trihalomethanes0.044 mg/L0.1 mg/L
44%
Boron0.028 mg/L1 mg/L
3%
Selenium0.00023 mg/L0.04 mg/L
<1%
Antimony0.0001 mg/L0.005 mg/L
2%
Lead0.00016 mg/L0.01 mg/L
2%
Nickel0.00059 mg/L0.02 mg/L
3%
Mercury0.000042 mg/L0.001 mg/L
4%
Bromate3.1e-7 mg/L0.01 mg/L
<1%

95mg of limescale minerals in every litre, typical for the CH area. CH6 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

2

forever-chemical detections in nearby rivers and groundwater

At 1 site. The highest was 6:2 FTSA at 0.0038 µg/L, at Westwood Farm BH SJ28/31, 9.3 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

CH6 in short

Tap water in CH6 (Flintshire) is supplied by Dŵr Cymru Welsh Water in the Flintshire Central zone and scores 9.3 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.

  • The lowest score of the 5 areas tested in FlintshireCH6 scores 9.3 out of 10. The best in Flintshire, CH4, scores 10.
  • Every one of the 4 neighbouring districts scores higherCH4 next door scores 10, against 9.3 here. Supply zones, not distance, explain the gap. See CH4
  • Trihalomethanes is the reading closest to its limit, at 44% of the 0.1 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading

Next door

CH79.4 out of 10 · 95 mg/LCH410.0 out of 10 · 95 mg/LCH89.4 out of 10 · 95 mg/LCH59.4 out of 10 · 95 mg/L

Questions about CH6 water

Is CH6 tap water safe to drink?

Based on the latest tests, CH6 (Flintshire) water scores 9.3/10, which is safe. 0 of 23 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in CH6 water?

We tested 23 contaminants in CH6 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 CH6?

CH6 (Flintshire) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.

Is CH6 water hard or soft?

No hardness reading has been published for CH6 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 CH6?

CH6 water scored 9.3/10 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 CH6 water?

The tap-water tests we hold for CH6 do not include a PFAS result. Environment Agency monitoring found PFAS in 2 river and groundwater samples from 1 sites within 10 km of CH6, the highest being 6:2 FTSA at 0.0038 µg/L about 9.3 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 CH6

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
Manganese0.041 mg/L0.05 mg/L
Iron1.05 mg/L0.2 mg/L
Aluminium0.177 mg/L0.2 mg/L
pH0.0834 pHNone
Dissolved Oxygen9.58 mg/LNone
Hardness (as CaCO3)202 mg/LNone
Fluoride0.132 mg/L1.5 mg/L
Phosphate0.167 mg/LNone
Zinc0.0095 mg/LNone
Chromium0.0006 mg/L0.05 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