Tap water in NG25, Newark and SherwoodSafe to drink.Very hard.
Supplied by Severn Trent. 502 samples, 20 substances, latest on 9 December 2025. Everything is inside the legal limit, and nothing comes close to it.
9.2 / 10
The tank is as full as the score. The specks are the minerals that make water hard.
What to do about it
Hard water: compare softener quotes
At 341 mg/L a softener is the only thing that stops limescale. Filters do not soften water.
It pays for itself in most homes at this hardness, through a boiler that stays efficient and appliances that last.
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
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 NG25 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.
Nitrate came closest to a limit, at 71% of it. 16 of 17 substances used under a quarter of theirs.
- Nitrate71%
- Arsenic11%
- Aluminium11%
- Nickel5%
- Fluoride5%
- Copper5%
- Trihalomethanes4%
- Colour4%
- Iron4%
- Turbidity3%
- Manganese1%
- Lead1%
- Antimony1%
- Selenium1%
- Chromium<1%
- Nitrite<1%
- Cadmium<1%
- pH 7.8 pH
- Conductivity 408 µS/cm
- Phosphate 0.761 mg/L
All 20 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Copper | 0.0927 mg/L | 2 mg/L | 5% |
| Fluoride | 0.07 mg/L | 1.5 mg/L | 5% |
| Arsenic | 0.00114 mg/L | 0.01 mg/L | 11% |
| Cadmium | 0.00001 mg/L | 0.005 mg/L | <1% |
| Chromium | 0.00042 mg/L | 0.05 mg/L | <1% |
| Nickel | 0.001 mg/L | 0.02 mg/L | 5% |
| Lead | 0.00014 mg/L | 0.01 mg/L | 1% |
| Antimony | 0.000059 mg/L | 0.005 mg/L | 1% |
| Selenium | 0.00043 mg/L | 0.04 mg/L | 1% |
| Nitrate | 35.7 mg/L | 50 mg/L | 71% |
| Nitrite | 0.003 mg/L | 0.5 mg/L | <1% |
| Trihalomethanes | 0.0041 mg/L | 0.1 mg/L | 4% |
| Colour | 0.8 mg/L Pt/Co | 20 mg/L Pt/Co | 4% |
| Turbidity | 0.12 NTU | 4 NTU | 3% |
| pH | 7.8 pH | No legal limit | – |
| Conductivity | 408 µS/cm | No legal limit | – |
| Aluminium | 0.021 mg/L | 0.2 mg/L | 11% |
| Iron | 0.0072 mg/L | 0.2 mg/L | 4% |
| Manganese | 0.00073 mg/L | 0.05 mg/L | 1% |
| Phosphate | 0.761 mg/L | No legal limit | – |
341mg of limescale minerals in every litre, typical for the NG area. NG25 has no reading of its own.
This is the water that furs up kettles
Very hard on the UK scale. It is fine to drink. It is hard on boilers, showers, skin and anything that heats water, and a jug or tap filter will not change that.
Softener quotes for NG25
Leave your details and we will email you when we can match you with installers who cover NG25. No obligation.
Request a free assessment and we'll come back to you with local installer options for your area.
100%
free, no obligation
shared only with your consent
Your river is the Greet Catchment (trib of Trent), rated poor
The Environment Agency rated the Greet Catchment (trib of Trent) as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by fish and phosphate. 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
32
forever-chemical detections in nearby rivers and groundwater
At 3 sites. The highest was 6:2 FTSA at 0.0094 µg/L, at RSN1788 Hoveringham, 7.8 km away, in September 2024. These are river and borehole samples, not tests of your tap water.
Every PFAS sample around Nottingham · Which filters remove PFAS · PFAS explained
NG25 in short
Tap water in NG25 (Newark and Sherwood) is supplied by Severn Trent in the Newark and Sherwood Central zone and scores 9.2 out of 10, against an England and Wales average of 9.0. None of the 20 tested substances came close to a limit. The latest sample is from 9 December 2025.
- The lowest score of the 5 areas tested in Newark and SherwoodNG25 scores 9.2 out of 10. The best in Newark and Sherwood, NG24, scores 9.6.
- Among the hardest water in the country at 341 mg/LVery hard starts at 250 mg/L. At this level kettles scale up within weeks and a softener is a normal purchase across the NG postcode area. How hardness is measured
- Nitrate is the reading closest to its limit, at 71% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
Questions about NG25 water
Is NG25 tap water safe to drink?
Based on the latest tests, NG25 (Newark and Sherwood) water scores 9.2/10, which is safe. 0 of 20 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.
What contaminants are in NG25 water?
We tested 20 contaminants in NG25 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 NG25?
NG25 (Newark and Sherwood) is supplied by Severn Trent. You can view their full profile and compliance data on our supplier page.
Is NG25 water hard or soft?
No hardness reading has been published for NG25 itself. Across the NG postcode area the typical value is 341 mg/L CaCO3, which is classified as very hard. Hard water can cause limescale buildup. A water softener or filter jug may help.
Should I use a water filter in NG25?
NG25 water scored 9.2/10 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 NG25 water?
The tap-water tests we hold for NG25 do not include a PFAS result. Environment Agency monitoring found PFAS in 32 river and groundwater samples from 3 sites within 10 km of NG25, the highest being 6:2 FTSA at 0.0094 µg/L about 7.8 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.
How clean is the river near NG25?
The Environment Agency rated the Greet Catchment (trib of Trent) as poor for ecological health in its 2025 assessment, meaning the river is badly affected, with much of the expected wildlife missing. It is held back by fish and phosphate. 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 NG25, which is treated before it reaches homes.
Keep reading
- Best Filter for PFAS RemovalThe filters with independent certification to remove forever chemicals
- PFAS Forever ChemicalsWhat PFAS are and how to reduce your exposure at home
- Best Water Softener UKHarvey, Kinetico, BWT, Monarch and Water2Buy compared, with real costs
- Do I Need a Water Softener?The hardness bands, the symptoms, and a postcode check
- UK Water Hardness MapIs your water hard or soft, and does it matter?
- Do I need a water softener?The hardness bands, the symptoms, and when the answer is no
- Best water softener UKHarvey, Kinetico, BWT, Monarch and Water2Buy compared
- Water softener costUnit, fitting and salt, and how long the payback takes
- Installation explainedWhere it goes, the bypass tap, the drain, DIY or plumber
- Harvey vs KineticoThe two premium twin-cylinder brands, side by side
- Softener salt guideTablet, block or granular, and how much you get through
- Salt-free softenersConditioners and electronic descalers, honestly assessed
PFAS explainedHow to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near NG25
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.
Get alerts for your area
We'll email you when water quality data changes for NG25.