348mg of limescale minerals in every litre, the median across NR districts
Is Norwich a hard water area?
Yes. Tap water across the NR postcode area is very hard, the top band on the scale water companies use, with a median of 348 mg/L calcium carbonate. It ranges from 309 mg/L in NR27 to 445 mg/L in NR15, from 29 districts with their own water company reading and 6 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 NR 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 |
|---|---|---|---|
| NR15 | South Norfolk | 445 | very hard |
| NR14 | South Norfolk | 427 | very hard |
| NR23 | North Norfolk | 407 | very hard |
| NR28 | North Norfolk | 391 | very hard |
| NR24 | North Norfolk | 385 | very hard |
| NR21 | North Norfolk | 385 | very hard |
| NR22 | North Norfolk | 385 | very hard |
| NR16 | Breckland | 365 | very hard |
| NR17 | Breckland | 365 | very hard |
| NR18 | South Norfolk | 365 | very hard |
| NR29 | Great Yarmouth | 361 | very hard |
| NR25 | North Norfolk | 359 | very hard |
| NR26 | North Norfolk | 359 | very hard |
| NR19 | Breckland | 357 | very hard |
| NR31* | Great Yarmouth | 348 | very hard |
| NR33* | East Suffolk | 348 | very hard |
| NR20 | Breckland | 348 | very hard |
| NR32* | East Suffolk | 348 | very hard |
| NR34* | East Suffolk | 348 | very hard |
| NR35* | East Suffolk | 348 | very hard |
| NR30* | Great Yarmouth | 348 | very hard |
| NR9 | South Norfolk | 344 | very hard |
| NR12 | North Norfolk | 339 | very hard |
| NR7 | Norwich | 339 | very hard |
| NR13 | Broadland | 339 | very hard |
| NR6 | Norwich | 334 | very hard |
| NR8 | Broadland | 334 | very hard |
| NR10 | Broadland | 334 | very hard |
| NR3 | Norwich | 331 | very hard |
| NR1 | Norwich | 331 | very hard |
| NR2 | Norwich | 331 | very hard |
| NR4 | Norwich | 316 | very hard |
| NR5 | Norwich | 316 | very hard |
| NR11 | North Norfolk | 309 | very hard |
| NR27 | North Norfolk | 309 | very hard |
What to do about it
Hard water: compare softener quotes
At 348 mg/L most NR 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 309 and 445 mg/L.
Softener quotes for Norwich
At 348 mg/L most NR 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 Norwich water
Is Norwich a hard water area?
Yes. The median hardness across NR postcode districts is 348 mg/L calcium carbonate, which is very hard. 100% of the 35 districts we hold readings for are hard or very hard (180 mg/L and above).
What is the water hardness in Norwich?
Between 309 and 445 mg/L depending on the district, with a median of 348. The hardest measured district is NR15 at 445 mg/L and the softest is NR27 at 309. 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 Norwich?
In most NR homes a softener pays for itself: at 348 mg/L kettles, boilers and showers scale up quickly. Check your own district first, because hardness varies from 309 to 445 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.