Tap water in CH5, FlintshireSafe to drink.Moderately soft.
Supplied by Dŵr Cymru Welsh Water. 727 samples, 22 substances, latest on 22 December 2024. Everything is inside the legal limit, and nothing comes close to it.
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
ZeroWater 12-Cup Ready-Pour
£40typical price
Households concerned about PFAS and heavy metals
Waterdrop 10UA Under Sink
£70typical price
High-volume under-sink filtration without RO complexity
BRITA Marella XL + MAXTRA PRO
£25typical price
Basic chlorine and taste improvement on a budget
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What's in a glass of CH5 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 59% of it. 18 of 19 substances used under a quarter of theirs.
- Trihalomethanes59%
- Colour23%
- Nitrate19%
- Fluoride7%
- Turbidity7%
- Iron4%
- Mercury4%
- Aluminium3%
- Nickel3%
- Copper3%
- Boron3%
- Nitrite3%
- Arsenic2%
- Antimony2%
- Lead2%
- Manganese1%
- Selenium<1%
- Cadmium<1%
- Chromium<1%
- E. coli none found
- Coliform Bacteria none found
- Conductivity 250 µS/cm
All 22 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Colour | 4.6 mg/L Pt/Co | 20 mg/L Pt/Co | 23% |
| E. coli | 0 count/100ml | Must be zero | None found |
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
| Conductivity | 250 µS/cm | No legal limit | – |
| Aluminium | 0.0062 mg/L | 0.2 mg/L | 3% |
| Iron | 0.0087 mg/L | 0.2 mg/L | 4% |
| Manganese | 0.00068 mg/L | 0.05 mg/L | 1% |
| Turbidity | 0.27 NTU | 4 NTU | 7% |
| Nickel | 0.00059 mg/L | 0.02 mg/L | 3% |
| Lead | 0.00016 mg/L | 0.01 mg/L | 2% |
| Copper | 0.058 mg/L | 2 mg/L | 3% |
| Mercury | 0.000042 mg/L | 0.001 mg/L | 4% |
| Fluoride | 0.11 mg/L | 1.5 mg/L | 7% |
| Cadmium | 0.000025 mg/L | 0.005 mg/L | <1% |
| Chromium | 0.000092 mg/L | 0.05 mg/L | <1% |
| Arsenic | 0.0002 mg/L | 0.01 mg/L | 2% |
| Nitrite | 0.013 mg/L | 0.5 mg/L | 3% |
| Nitrate | 9.47 mg/L | 50 mg/L | 19% |
| Trihalomethanes | 0.059 mg/L | 0.1 mg/L | 59% |
| Boron | 0.028 mg/L | 1 mg/L | 3% |
| Antimony | 0.0001 mg/L | 0.005 mg/L | 2% |
| Selenium | 0.00023 mg/L | 0.04 mg/L | <1% |
95mg of limescale minerals in every litre, typical for the CH area. CH5 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.
Your river is the Garden City Drain, rated moderate
The Environment Agency rated the Garden City Drain as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by insects and other small river life, ammonia and organic pollution (bod). It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants.
None of this is a test of your tap water. Environment Agency record · River health across England
CH5 in short
Tap water in CH5 (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 22 December 2024.
- Trihalomethanes is the reading closest to its limit, at 59% of the 0.1 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
- 2nd cleanest of 5 areas tested in FlintshireOnly 1 area in Flintshire scored higher. The best is CH4 on 10.
- 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
Questions about CH5 water
Is CH5 tap water safe to drink?
Based on the latest tests, CH5 (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 CH5 water?
We tested 22 contaminants in CH5 water. None exceeded recommended safe levels.
Who supplies water in CH5?
CH5 (Flintshire) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.
Is CH5 water hard or soft?
No hardness reading has been published for CH5 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 CH5?
CH5 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 CH5 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for CH5, 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.
How clean is the river near CH5?
The Environment Agency rated the Garden City Drain as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by insects and other small river life, ammonia and organic pollution (bod). It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants. This is a rating of the river, not of tap water in CH5, which is treated before it reaches homes.
Keep reading
- Is UK Tap Water Safe?Everything you need to know about tap water safety in the UK
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- How to Test Your Tap WaterFrom DIY strips to professional lab analysis
- Best Water Filter Jug UKBRITA vs ZeroWater vs the rest, tested against real data
How to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near CH5
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.
| Substance | Reading | Drinking water limit |
|---|---|---|
| Ammonia | 33 mg/L | 0.5 mg/L |
| pH | 7.89 pH | None |
| Temperature | 18.2 °C | None |
| Conductivity | 1625 µS/cm | None |
| Phosphate | 5.9 mg/L | None |
| Dissolved Oxygen | 0.272 mg/L | None |
| Nitrate | 0.192 mg/L | 50 mg/L |
| Nitrite | 0.0079 mg/L | 0.5 mg/L |
| Hardness (as CaCO3) | 281 mg/L | None |
| Fluoride | 0.101 mg/L | 1.5 mg/L |
| Iron | 0.053 mg/L | 0.2 mg/L |
| Copper | 0.003 mg/L | 2 mg/L |
| Zinc | 0.0354 mg/L | None |
Get alerts for your area
We'll email you when water quality data changes for CH5.