312mg of limescale minerals in every litre, the median across HU districts
Is Hull a hard water area?
Yes. Tap water across the HU postcode area is very hard, the top band on the scale water companies use, with a median of 312 mg/L calcium carbonate. It ranges from 182 mg/L in HU18 to 373 mg/L in HU16, from 19 districts with their own water company reading and 1 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 HU 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 |
|---|---|---|---|
| HU16 | East Riding of Yorkshire | 373 | very hard |
| HU5 | Kingston upon Hull, City of | 367 | very hard |
| HU3 | Kingston upon Hull, City of | 366 | very hard |
| HU10 | East Riding of Yorkshire | 366 | very hard |
| HU4 | Kingston upon Hull, City of | 360 | very hard |
| HU1 | Kingston upon Hull, City of | 355 | very hard |
| HU2 | Kingston upon Hull, City of | 355 | very hard |
| HU17 | East Riding of Yorkshire | 338 | very hard |
| HU13 | East Riding of Yorkshire | 331 | very hard |
| HU15 | East Riding of Yorkshire | 312 | very hard |
| HU20* | East Riding of Yorkshire | 312 | very hard |
| HU6 | Kingston upon Hull, City of | 303 | very hard |
| HU14 | East Riding of Yorkshire | 302 | very hard |
| HU9 | Kingston upon Hull, City of | 292 | very hard |
| HU8 | Kingston upon Hull, City of | 285 | very hard |
| HU7 | Kingston upon Hull, City of | 271 | very hard |
| HU12 | East Riding of Yorkshire | 258 | very hard |
| HU19 | East Riding of Yorkshire | 256 | very hard |
| HU11 | East Riding of Yorkshire | 193 | hard |
| HU18 | East Riding of Yorkshire | 182 | hard |
What to do about it
Hard water: compare softener quotes
At 312 mg/L most HU 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 182 and 373 mg/L.
Softener quotes for Hull
At 312 mg/L most HU 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 Hull water
Is Hull a hard water area?
Yes. The median hardness across HU postcode districts is 312 mg/L calcium carbonate, which is very hard. 100% of the 20 districts we hold readings for are hard or very hard (180 mg/L and above).
What is the water hardness in Hull?
Between 182 and 373 mg/L depending on the district, with a median of 312. The hardest measured district is HU16 at 373 mg/L and the softest is HU18 at 182. 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 Hull?
In most HU homes a softener pays for itself: at 312 mg/L kettles, boilers and showers scale up quickly. Check your own district first, because hardness varies from 182 to 373 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.