Tap water in CH4, FlintshireToo few tap tests to call it.Moderately soft.
Supplied by Dŵr Cymru Welsh Water. 4 samples, 2 substances, latest on 27 March 2024. Only 2 of them have a legal limit to judge against, so treat the score as provisional.
10.0 / 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
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 CH4 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.
- E. coli none found
- Coliform Bacteria none found
All 2 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| E. coli | 0 count/100ml | Must be zero | None found |
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
95mg of limescale minerals in every litre, typical for the CH area. CH4 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 Balderton drain, rated moderate
The Environment Agency rated the Balderton 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 ammonia, dissolved oxygen and insects and other small river life. 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
CH4 in short
Tap water in CH4 (Flintshire) is supplied by Dŵr Cymru Welsh Water in the Flintshire Central zone and scores 10.0 out of 10, against an England and Wales average of 9.0. None of the 2 tested substances came close to a limit. The latest sample is from 27 March 2024.
- The newest sample here is from March 2024That is over 2 years old, so treat this page as a record of past results rather than today's tap water.
- The cleanest tap water of the 5 areas tested in FlintshireCH4 scores 10 out of 10, ahead of CH5 in second place on 9.4.
- Scores higher than all 5 neighbouring districtsThe nearest rival is CH7 on 9.4, against 10 here. Compare with CH7
Questions about CH4 water
Is CH4 tap water safe to drink?
Based on the latest tests, CH4 (Flintshire) water scores 10/10, which is safe. 0 of 2 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.
What contaminants are in CH4 water?
We tested 2 contaminants in CH4 water. None exceeded recommended safe levels.
Who supplies water in CH4?
CH4 (Flintshire) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.
Is CH4 water hard or soft?
No hardness reading has been published for CH4 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 CH4?
CH4 water scored 10/10 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 CH4 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for CH4, 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 CH4?
The Environment Agency rated the Balderton 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 ammonia, dissolved oxygen and insects and other small river life. 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 CH4, 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
- Best Water Filters UKEvery filter type compared on what it actually removes
- 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 CH4
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 |
| Manganese | 0.043 mg/L | 0.05 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) | 72.2 mg/L | None |
| Fluoride | 0.063 mg/L | 1.5 mg/L |
| Aluminium | 0.051 mg/L | 0.2 mg/L |
Get alerts for your area
We'll email you when water quality data changes for CH4.