293mg of limescale minerals in every litre, the median across DN districts
Is Doncaster a hard water area?
Yes. Tap water across the DN postcode area is very hard, the top band on the scale water companies use, with a median of 293 mg/L calcium carbonate. It ranges from 239 mg/L in DN11 to 422 mg/L in DN15, from 29 districts with their own water company reading and 3 estimated from the area.
- Soft
- 0 to 60 mg/L
- Moderately soft
- 60 to 120 mg/L
- Slightly hard
- 120 to 180 mg/L
- Hard
- 180 to 200 mg/L
- Very hard
- 200 to 400 mg/L
Hardness by DN district
Hardest first. Hard starts at 180 mg/L, very hard at 250. Districts marked with an asterisk take the area's median rather than a reading of their own.
| District | Area | mg/L | Hardness |
|---|---|---|---|
| DN15 | North Lincolnshire | 422 | very hard |
| DN16 | North Lincolnshire | 376 | very hard |
| DN17 | North Lincolnshire | 376 | very hard |
| DN20 | North Lincolnshire | 376 | very hard |
| DN21 | West Lindsey | 332 | very hard |
| DN38 | North Lincolnshire | 315 | very hard |
| DN32 | North East Lincolnshire | 301 | very hard |
| DN37 | North East Lincolnshire | 301 | very hard |
| DN31 | North East Lincolnshire | 301 | very hard |
| DN34 | North East Lincolnshire | 301 | very hard |
| DN41 | North East Lincolnshire | 301 | very hard |
| DN35 | North East Lincolnshire | 296 | very hard |
| DN9* | North Lincolnshire | 293 | very hard |
| DN10* | Bassetlaw | 293 | very hard |
| DN18 | North Lincolnshire | 293 | very hard |
| DN19 | North Lincolnshire | 293 | very hard |
| DN22* | Bassetlaw | 293 | very hard |
| DN39 | North Lincolnshire | 293 | very hard |
| DN40 | North East Lincolnshire | 293 | very hard |
| DN33 | North East Lincolnshire | 288 | very hard |
| DN14 | East Riding of Yorkshire | 286 | very hard |
| DN6 | Doncaster | 270 | very hard |
| DN12 | Doncaster | 266 | very hard |
| DN7 | Doncaster | 262 | very hard |
| DN4 | Doncaster | 258 | very hard |
| DN8 | Doncaster | 258 | very hard |
| DN5 | Doncaster | 257 | very hard |
| DN3 | Doncaster | 254 | very hard |
| DN1 | Doncaster | 253 | very hard |
| DN2 | Doncaster | 253 | very hard |
| DN36 | East Lindsey | 242 | hard |
| DN11 | Doncaster | 239 | hard |
What to do about it
Hard water: compare softener quotes
At 293 mg/L most DN homes get their money back on a softener within a few years. A filter will not touch limescale; only a softener does.
- Free quotes
- Local installers
- No obligation
Check your own district first
The area figure is a median. Your district can sit anywhere between 239 and 422 mg/L.
Softener quotes for Doncaster
At 293 mg/L most DN homes get their money back on a softener within a few years. Free quotes from installers covering your postcode.
Request a free assessment and we'll come back to you with local installer options for your area.
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Before you buy
- 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
Questions about Doncaster water
Is Doncaster a hard water area?
Yes. The median hardness across DN postcode districts is 293 mg/L calcium carbonate, which is very hard. 100% of the 32 districts we hold readings for are hard or very hard (180 mg/L and above).
What is the water hardness in Doncaster?
Between 239 and 422 mg/L depending on the district, with a median of 293. The hardest measured district is DN15 at 422 mg/L and the softest is DN11 at 239. Figures come from water company drinking-water tests, with postcode-area estimates for districts that have no reading of their own.
Do I need a water softener in Doncaster?
In most DN homes a softener pays for itself: at 293 mg/L kettles, boilers and showers scale up quickly. Check your own district first, because hardness varies from 239 to 422 within the area.
Hardness as mg/L calcium carbonate from water company drinking-water tests and postcode checkers. See the UK hardness map for every area.