HU postcode district map, Kingston upon Hull
Supplier statuses last checked .
The HU postcode area covers 20 districts and 11,369 live postcodes, from HU1 to HU20. It is centred on Kingston upon Hull and also covers Hessle, Beverley, Hedon, Cottingham and South Cave.
Districts here average 568 postcodes.
Where the HU districts sit
4 districts are plotted without a label where labels would overlap; every one is in the table below.
Where HU sits
It falls across East Riding of Yorkshire and City of Kingston upon Hull.
Water supply across HU
All 20 HU districts are supplied by Yorkshire Water. That makes HU simple in a way many areas are not: one company, one set of rules, one status to check.
No hosepipe ban currently applies anywhere in HU.
The shape of the HU area
HU17 is the largest district with 1,320 postcodes around Beverley, and HU20 the smallest with 34. The area divides into 66 postcode sectors.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: HU1, HU2, HU3, HU5, HU7, HU8 and HU9 all point at Kingston upon Hull, HU4, HU10, HU13 and HU14 all point at Hessle and HU6 and HU16 all point at Cottingham.
What borders HU
HU sits next to DN (Doncaster) to the south west, YO (York) to the north west, LN (Lincoln) to the south, WF (Wakefield) to the west and LS (Leeds) to the west.
Its neighbours run in 4 different directions, so HU is landlocked by other postcode areas on most sides.
HU districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| HU1 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU2 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU3 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU4 | Hessle | Yorkshire Water | No restrictions |
| HU5 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU6 | Cottingham | Yorkshire Water | No restrictions |
| HU7 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU8 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU9 | Kingston upon Hull | Yorkshire Water | No restrictions |
| HU10 | Hessle | Yorkshire Water | No restrictions |
| HU11 | Hedon | Yorkshire Water | No restrictions |
| HU12 | Hedon | Yorkshire Water | No restrictions |
| HU13 | Hessle | Yorkshire Water | No restrictions |
| HU14 | Hessle | Yorkshire Water | No restrictions |
| HU15 | South Cave | Yorkshire Water | No restrictions |
| HU16 | Cottingham | Yorkshire Water | No restrictions |
| HU17 | Beverley | Yorkshire Water | No restrictions |
| HU18 | Hornsea | Yorkshire Water | No restrictions |
| HU19 | Withernsea | Yorkshire Water | No restrictions |
| HU20 | South Cave | Yorkshire Water | No restrictions |
Principal settlement is the town or city each district sits in or nearest to, derived from OS Open Names. It is not the Royal Mail post town, which is licensed data and not published openly. Status is resolved live from each company’s own notice.
Water hardness in HU
Figures are in milligrams per litre as calcium carbonate, the unit UK water companies report in. 17 of 20 districts have a published figure.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| HU1 | Not published by Yorkshire Water. Check with your supplier. | |||
| HU2 | 363.8 mg/l That is hard on the water industry scale. | 363.8 mg/l as CaCO₃ | E01012763, E01012806, E01033109 | Yorkshire Water 2026 edition |
| HU3 | 364.6 mg/l That is hard on the water industry scale. | 364.6 mg/l as CaCO₃ | E01012852, E01012855, E01012863, E01012864 | Yorkshire Water 2026 edition |
| HU4 | 358.5 mg/l That is hard on the water industry scale. | 358.5 mg/l as CaCO₃ | E01012770, E01012858, E01012886 | Yorkshire Water 2026 edition |
| HU5 | 363.8 mg/l That is hard on the water industry scale. | 363.8 mg/l as CaCO₃ | E01012762, E01012773, E01012795, E01012872 | Yorkshire Water 2026 edition |
| HU6 | 352.1 mg/l That is hard on the water industry scale. | 352.1 mg/l as CaCO₃ | E01012765, E01012873, E01012877, E01012879 +1 more | Yorkshire Water 2026 edition |
| HU7 | 190.5–320.9 mg/l varies across this district | 249 mg/l as CaCO₃ | E01012785, E01012832, E01012908 | Yorkshire Water 2026 edition |
| HU8 | 235.2–284.7 mg/l varies across this district | 266.5 mg/l as CaCO₃ | E01012820, E01012835, E01012904 | Yorkshire Water 2026 edition |
| HU9 | 225.5–359.6 mg/l varies across this district | 296.3 mg/l as CaCO₃ | E01012836, E01012841, E01012848, E01012849 +1 more | Yorkshire Water 2026 edition |
| HU10 | 365.9 mg/l That is hard on the water industry scale. | 365.9 mg/l as CaCO₃ | E01013106, E01013116 | Yorkshire Water 2026 edition |
| HU11 | Not published by Yorkshire Water. Check with your supplier. | |||
| HU12 | 245.5–292.2 mg/l varies across this district | 269.1 mg/l as CaCO₃ | E01013081, E01013095, E01013097, E01013102 | Yorkshire Water 2026 edition |
| HU13 | 262.2 mg/l That is hard on the water industry scale. | 262.2 mg/l as CaCO₃ | E01013012 | Yorkshire Water 2026 edition |
| HU14 | 298.5 mg/l That is hard on the water industry scale. | 298.5 mg/l as CaCO₃ | E01013091, E01033495 | Yorkshire Water 2026 edition |
| HU15 | 278.5 mg/l That is hard on the water industry scale. | 278.5 mg/l as CaCO₃ | E01013025, E01013026 | Yorkshire Water 2026 edition |
| HU16 | 369.6–377.1 mg/l varies across this district | 373.4 mg/l as CaCO₃ | E01012954, E01012960 | Yorkshire Water 2026 edition |
| HU17 | 343.1 mg/l That is hard on the water industry scale. | 343.1 mg/l as CaCO₃ | E01012927, E01013040, E01013044, E01013066 +1 more | Yorkshire Water 2026 edition |
| HU18 | 221.7–256.5 mg/l varies across this district | 239.1 mg/l as CaCO₃ | E01012988, E01013051 | Yorkshire Water 2026 edition |
| HU19 | 262 mg/l That is hard on the water industry scale. | 262 mg/l as CaCO₃ | E01013083 | Yorkshire Water 2026 edition |
| HU20 | Not published by Yorkshire Water. Check with your supplier. | |||
Descriptions such as very soft, soft, moderately hard, hard, very hard are the water industry scale: very soft below 75, soft 75–125, moderately hard 125–250, hard 250–375, very hard above 375 mg/l. Your supplier may use a different scale for the same number.
Contains Yorkshire Water drinking water quality data, via Stream, licensed under CC BY 4.0. Edition 2026, published 1 January 2026. Yorkshire Water publishes this as mg/l without naming the species. We read it as calcium carbonate because the determinand is Hardness total and the dataset contains no calcium determinand. Evidence: determinand "Hardness total"; DWI code "HARD T"; no calcium determinand published in the dataset.
Hardness is published per census area, not per postcode, so these figures characterise a district rather than measuring one address. They are a scale and taste matter, not a safety one. Hardness data version wessex-water@2022-2025+yorkshire-water@2026.
Download the HU data
No signup, no email wall. GeoJSON carries the district points, the supplier and the live status, so it can be dropped straight into a map.
District positions are averaged postcode centroids from OS Code-Point Open. They show roughly where a district sits, not where its boundary runs, and are not legal boundaries.
Frequently asked questions
How many postcode districts are in the HU area?
There are 20 HU postcode districts, running from HU1 to HU20, and they contain 11,369 live postcodes across 66 sectors.
What towns does the HU postcode area cover?
HU covers Kingston upon Hull, Hessle, Beverley, Hedon, Cottingham and South Cave. The area takes its name from Kingston upon Hull, and each district is listed with its settlement in the table on this page.
Which water company supplies HU postcodes?
Yorkshire Water supplies all 20 HU districts. Supply boundaries follow the pipe network rather than postcode geography, so confirm against your water bill if you are near the edge of the area.
Why do HU1 and HU2 both say Kingston upon Hull?
HU1, HU2, HU3, HU5, HU7, HU8 and HU9 all serve Kingston upon Hull, covering different parts of it. A single town routinely needs more than one postcode district once it passes a few thousand delivery points, so this is normal rather than an error in an address.
Can I download a free HU postcode map?
Yes. This page offers the HU districts as GeoJSON, CSV and SVG, free and with no signup or email address required. The GeoJSON carries each district's position, its water company and its current restriction status, so it can be dropped straight into a mapping tool.
Why is the HU area called Kingston upon Hull when it covers Beverley?
HU takes its letters from Kingston upon Hull, where the sorting office that served the area was based when the code was allocated. Beverley is the largest settlement in the area today, in HU17, but the area code follows the historic sorting geography rather than current population.
Which councils cover the HU postcode area?
HU reaches into East Riding of Yorkshire and City of Kingston upon Hull. A postcode area is not a council area: they were drawn for different purposes and a single district can sit across a council boundary, so your postcode does not tell you which authority you pay.