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tapwater
England and Wales average 9.0

Tap water in CH7, FlintshireSafe to drink.Moderately soft.

Supplied by Dŵr Cymru Welsh Water. 531 samples, 22 substances, latest on 19 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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What's in a glass of CH7 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%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%Manganese: 0.003 mg/L, 6% of the 0.05 mg/L limitManganese6%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%Aluminium: 0.039 mg/L, 19% of the 0.2 mg/L limitAluminium19%Colour: 4.6 mg/L Pt/Co, 23% of the 20 mg/L Pt/Co limitColour23%Iron: 0.047 mg/L, 24% of the 0.2 mg/L limitIron24%Trihalomethanes: 0.039 mg/L, 39% of the 0.1 mg/L limitTrihalomethanes39%
  1. Trihalomethanes39%
  2. Iron24%
  3. Colour23%
  4. Aluminium19%
  5. Nitrite11%
  6. Fluoride7%
  7. Turbidity7%
  8. Manganese6%
  9. Nitrate5%
  10. Mercury4%
  11. Nickel3%
  12. Copper3%
  13. Boron3%
  14. Lead2%
  15. Arsenic1%
  16. Selenium<1%
  17. Antimony<1%
  18. Cadmium<1%
  19. Chromium<1%
  • Conductivity 180 µS/cm
  • E. coli none found
  • Coliform Bacteria none found
All 22 results as a table
SubstanceResultLegal limitShare of limit
Conductivity180 µS/cmNo legal limit–
E. coli0 count/100mlMust be zeroNone found
Coliform Bacteria0 count/100mlMust be zeroNone found
Manganese0.003 mg/L0.05 mg/L
6%
Iron0.047 mg/L0.2 mg/L
24%
Colour4.6 mg/L Pt/Co20 mg/L Pt/Co
23%
Turbidity0.27 NTU4 NTU
7%
Aluminium0.039 mg/L0.2 mg/L
19%
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%

95mg of limescale minerals in every litre, typical for the CH area. CH7 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

CH7 in short

Tap water in CH7 (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 22 tested substances came close to a limit. The latest sample is from 19 December 2024.

  • 3rd cleanest of 5 areas tested in FlintshireSquarely mid-table for Flintshire, between CH4 on 10 and CH6 on 9.3.
  • Nothing tested came within 40% of its legal limitThe highest was Trihalomethanes at 39% of the 0.1 mg/L maximum. See every reading
  • Moderately soft water at 95 mg/LLittle limescale to speak of across the CH postcode area. A softener would be money wasted. How hardness is measured

Next door

CH410.0 out of 10 · 95 mg/LCH89.4 out of 10 · 95 mg/LCH59.4 out of 10 · 95 mg/LCH69.3 out of 10 · 95 mg/L

Questions about CH7 water

Is CH7 tap water safe to drink?

Based on the latest tests, CH7 (Flintshire) water scores 9.4/10, which is safe. 0 of 22 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.

What contaminants are in CH7 water?

We tested 22 contaminants in CH7 water. None exceeded recommended safe levels.

Who supplies water in CH7?

CH7 (Flintshire) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.

Is CH7 water hard or soft?

No hardness reading has been published for CH7 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 CH7?

CH7 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 CH7 water?

No PFAS (forever chemicals) result is attached to the tap-water tests for CH7, 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

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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