Tap water in DN22, BassetlawSafe to drink.Very hard.
Supplied by Severn Trent. 48 samples, 19 substances, latest on 22 October 2019. Everything is inside the legal limit, and nothing comes close to it.
8.7 / 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 293 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 DN22 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 64% of it. 15 of 17 substances used under a quarter of theirs.
- Nitrate64%
- Fluoride59%
- Arsenic16%
- Trihalomethanes15%
- Lead13%
- Colour6%
- Turbidity6%
- Aluminium4%
- Nickel3%
- Copper2%
- Iron2%
- Antimony1%
- Chromium<1%
- Selenium<1%
- Nitrite<1%
- Manganese<1%
- Cadmium<1%
- pH 7.58 pH
- Conductivity 570 µS/cm
All 19 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Colour | 1.2 mg/L Pt/Co | 20 mg/L Pt/Co | 6% |
| Turbidity | 0.24 NTU | 4 NTU | 6% |
| pH | 7.58 pH | No legal limit | – |
| Nitrate | 31.9 mg/L | 50 mg/L | 64% |
| Nitrite | 0.003 mg/L | 0.5 mg/L | <1% |
| Aluminium | 0.008 mg/L | 0.2 mg/L | 4% |
| Iron | 0.003 mg/L | 0.2 mg/L | 2% |
| Manganese | 0.0002 mg/L | 0.05 mg/L | <1% |
| Copper | 0.0463 mg/L | 2 mg/L | 2% |
| Cadmium | 0.00001 mg/L | 0.005 mg/L | <1% |
| Arsenic | 0.00157 mg/L | 0.01 mg/L | 16% |
| Fluoride | 0.88 mg/L | 1.5 mg/L | 59% |
| Nickel | 0.0005 mg/L | 0.02 mg/L | 3% |
| Antimony | 0.00005 mg/L | 0.005 mg/L | 1% |
| Lead | 0.00131 mg/L | 0.01 mg/L | 13% |
| Chromium | 0.0004 mg/L | 0.05 mg/L | <1% |
| Selenium | 0.00027 mg/L | 0.04 mg/L | <1% |
| Conductivity | 570 µS/cm | No legal limit | – |
| Trihalomethanes | 0.0149 mg/L | 0.1 mg/L | 15% |
293mg of limescale minerals in every litre, typical for the DN area. DN22 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 DN22
Leave your details and we will email you when we can match you with installers who cover DN22. 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 Idle from Maun/Poulter to Tiln, rated moderate
The Environment Agency rated the Idle from Maun/Poulter to Tiln as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by phosphate and water plants and algae. 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
DN22 in short
Tap water in DN22 (Bassetlaw) is supplied by Severn Trent in the Bassetlaw Central zone and scores 8.7 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 22 October 2019.
- The newest sample here is from October 2019That is over 6 years old, so treat this page as a record of past results rather than today's tap water.
- Nitrate is the reading closest to its limit, at 64% of the 50 mg/L maximumIt passed with room to spare, and everything else tested sat further below its limit. See every reading
- Very hard water at 293 mg/LThe threshold for very hard is 250 mg/L. Expect visible limescale on taps and in kettles across the DN postcode area. How hardness is measured
Questions about DN22 water
Is DN22 tap water safe to drink?
Based on the latest tests, DN22 (Bassetlaw) water scores 8.7/10, which is safe. 0 of 19 tested contaminants exceeded recommended levels. Water is supplied by Severn Trent.
What contaminants are in DN22 water?
We tested 19 contaminants in DN22 water. None exceeded recommended safe levels.
Who supplies water in DN22?
DN22 (Bassetlaw) is supplied by Severn Trent. You can view their full profile and compliance data on our supplier page.
Is DN22 water hard or soft?
No hardness reading has been published for DN22 itself. Across the DN postcode area the typical value is 293 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 DN22?
DN22 water scored 8.7/10 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 DN22 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for DN22, 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 DN22?
The Environment Agency rated the Idle from Maun/Poulter to Tiln as moderate for ecological health in its 2025 assessment, meaning the river is noticeably changed by pollution or engineering. It is held back by phosphate and water plants and algae. 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 DN22, which is treated before it reaches homes.
Keep reading
- 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?
- Is UK Tap Water Safe?Everything you need to know about tap water safety in the UK
- 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
How to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
River and groundwater readings near DN22
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 |
|---|---|---|
| Aluminium | 1.2 mg/L | 0.2 mg/L |
| Iron | 0.96 mg/L | 0.2 mg/L |
| pH | 8.11 pH | None |
| Temperature | 8.9 °C | None |
| Nitrate | 8.7 mg/L | 50 mg/L |
| Nitrite | 0.03 mg/L | 0.5 mg/L |
| Phosphate | 0.12 mg/L | None |
| Dissolved Oxygen | 10.8 mg/L | None |
| Ammonia | 0.11 mg/L | 0.5 mg/L |
| Copper | 0.003 mg/L | 2 mg/L |
| Manganese | 0.021 mg/L | 0.05 mg/L |
| Conductivity | 371 µS/cm | None |
| Zinc | 0.222 mg/L | None |
| PFAS (total) | 0.00095 µg/L | None |
Get alerts for your area
We'll email you when water quality data changes for DN22.