Tap water in NP8, PowysSafe to drink.
Supplied by Dŵr Cymru Welsh Water. 396 samples, 19 substances, latest on 26 November 2024. Everything is inside the legal limit, and nothing comes close to it.
9.6 / 10
The tank is as full as the score.
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 NP8 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.
Colour came closest to a limit, at 23% of it. 16 of 16 substances used under a quarter of theirs.
- Colour23%
- Trihalomethanes15%
- Nitrite11%
- Turbidity7%
- Nitrate5%
- Manganese4%
- Iron4%
- Aluminium4%
- Chromium3%
- Nickel3%
- Copper3%
- Arsenic3%
- Lead2%
- Antimony<1%
- Selenium<1%
- Cadmium<1%
- Coliform Bacteria none found
- E. coli none found
- Conductivity 110 µS/cm
All 19 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Coliform Bacteria | 0 count/100ml | Must be zero | None found |
| E. coli | 0 count/100ml | Must be zero | None found |
| Conductivity | 110 µS/cm | No legal limit | – |
| Iron | 0.0082 mg/L | 0.2 mg/L | 4% |
| Manganese | 0.0021 mg/L | 0.05 mg/L | 4% |
| Aluminium | 0.0078 mg/L | 0.2 mg/L | 4% |
| Colour | 4.6 mg/L Pt/Co | 20 mg/L Pt/Co | 23% |
| Turbidity | 0.27 NTU | 4 NTU | 7% |
| Trihalomethanes | 0.015 mg/L | 0.1 mg/L | 15% |
| Antimony | 0.000048 mg/L | 0.005 mg/L | <1% |
| Selenium | 0.00023 mg/L | 0.04 mg/L | <1% |
| Lead | 0.00016 mg/L | 0.01 mg/L | 2% |
| Nickel | 0.00059 mg/L | 0.02 mg/L | 3% |
| Cadmium | 0.000025 mg/L | 0.005 mg/L | <1% |
| Chromium | 0.0015 mg/L | 0.05 mg/L | 3% |
| Copper | 0.058 mg/L | 2 mg/L | 3% |
| Arsenic | 0.00027 mg/L | 0.01 mg/L | 3% |
| Nitrate | 2.61 mg/L | 50 mg/L | 5% |
| Nitrite | 0.056 mg/L | 0.5 mg/L | 11% |
NP8 in short
Tap water in NP8 (Powys) is supplied by Dŵr Cymru Welsh Water in the Powys Central zone and scores 9.6 out of 10, against an England and Wales average of 9.0. None of the 19 tested substances came close to a limit. The latest sample is from 26 November 2024.
- 3rd cleanest of 17 areas tested in PowysOnly 2 areas in Powys scored higher. The best is LD3 on 9.7.
- 0.6 points above the national average of 9Cleaner than the typical tested district in the UK. Compare every area
- Nothing tested came within 40% of its legal limitThe highest was Colour at 23% of the 20 mg/L Pt/Co maximum. See every reading
Questions about NP8 water
Is NP8 tap water safe to drink?
Based on the latest tests, NP8 (Powys) water scores 9.6/10, which is safe. 0 of 19 tested contaminants exceeded recommended levels. Water is supplied by Dŵr Cymru Welsh Water.
What contaminants are in NP8 water?
We tested 19 contaminants in NP8 water. None exceeded recommended safe levels.
Who supplies water in NP8?
NP8 (Powys) is supplied by Dŵr Cymru Welsh Water. You can view their full profile and compliance data on our supplier page.
Should I use a water filter in NP8?
NP8 water scored 9.6/10 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 NP8 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for NP8, 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
- 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
Get alerts for your area
We'll email you when water quality data changes for NP8.