SA postcode district map, Abertawe
Supplier statuses last checked .
We’re re-checking Welsh Water. Its last confirmed status is still shown here, because hiding a restriction we cannot currently re-read is the more expensive mistake, last confirmed 29 days ago.
The SA postcode area covers 53 districts and 23,295 live postcodes, from SA1 to SA99. It is centred on Abertawe and also covers Neath, Port Talbot, Gorseinon, Llanelli and Tyddewi.
Districts here average 440 postcodes.
Where the SA districts sit
17 districts are plotted without a label where labels would overlap; every one is in the table below.
Where SA sits
It is administratively fragmented, reaching into Carmarthenshire, Swansea, Neath Port Talbot and Pembrokeshire and 2 other authorities.
Every SA postcode is in Wales. Water there is regulated by Natural Resources Wales rather than the Environment Agency.
Water supply across SA
All 53 SA districts are supplied by Welsh Water, which is notable at this size: an area with this many districts usually crosses at least one supply boundary, and this one does not.
We are re-checking Welsh Water's status. It was last confirmed on 18 August 2026 as ban in force, and until it is confirmed again this page does not assert a current position for it.
The shape of the SA area
The districts are wildly uneven: SA1 holds 1,300 postcodes around Abertawe and SA80 holds 6, a ratio of about 217 to one. They divide into 147 sectors.
No single district dominates: the largest holds only about 6 per cent of the area's postcodes.
The numbering is not continuous. SA runs up to 99 but has only 53 districts, so 46 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: SA1, SA2, SA3, SA5, SA6, SA80 and SA99 all point at Abertawe, SA35, SA36, SA37 and SA38 all point at Newcastle Emlyn and SA7, SA10 and SA11 all point at Neath.
What borders SA
SA sits next to CF (Cardiff) to the south east, LD (Llandrindod Wells) to the east, NP (Pontypool) to the east, SY (Shrewsbury) to the north east and HR (Hereford) to the east.
SA districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| SA1 | Abertawe | Welsh Water | Check with your supplier |
| SA2 | Abertawe | Welsh Water | Check with your supplier |
| SA3 | Abertawe | Welsh Water | Check with your supplier |
| SA4 | Gorseinon | Welsh Water | Check with your supplier |
| SA5 | Abertawe | Welsh Water | Check with your supplier |
| SA6 | Abertawe | Welsh Water | Check with your supplier |
| SA7 | Neath | Welsh Water | Check with your supplier |
| SA8 | Pontardawe | Welsh Water | Check with your supplier |
| SA9 | Ystradgynlais | Welsh Water | Check with your supplier |
| SA10 | Neath | Welsh Water | Check with your supplier |
| SA11 | Neath | Welsh Water | Check with your supplier |
| SA12 | Port Talbot | Welsh Water | Check with your supplier |
| SA13 | Port Talbot | Welsh Water | Check with your supplier |
| SA14 | Pontarddulais | Welsh Water | Check with your supplier |
| SA15 | Llanelli | Welsh Water | Check with your supplier |
| SA16 | Burry Port | Welsh Water | Check with your supplier |
| SA17 | Cydweli | Welsh Water | Check with your supplier |
| SA18 | Ammanford | Welsh Water | Check with your supplier |
| SA19 | Llandeilo | Welsh Water | Check with your supplier |
| SA20 | Llanymddyfri | Welsh Water | Check with your supplier |
| SA31 | Caerfyrddin | Welsh Water | Check with your supplier |
| SA32 | Caerfyrddin | Welsh Water | Check with your supplier |
| SA33 | Sanclêr | Welsh Water | Check with your supplier |
| SA34 | Hendy-Gwyn | Welsh Water | Check with your supplier |
| SA35 | Newcastle Emlyn | Welsh Water | Check with your supplier |
| SA36 | Newcastle Emlyn | Welsh Water | Check with your supplier |
| SA37 | Newcastle Emlyn | Welsh Water | Check with your supplier |
| SA38 | Newcastle Emlyn | Welsh Water | Check with your supplier |
| SA39 | Llandysul | Welsh Water | Check with your supplier |
| SA40 | Llanybydder | Welsh Water | Check with your supplier |
| SA41 | Trefdraeth | Welsh Water | Check with your supplier |
| SA42 | Trefdraeth | Welsh Water | Check with your supplier |
| SA43 | Aberteifi | Welsh Water | Check with your supplier |
| SA44 | Llandysul | Welsh Water | Check with your supplier |
| SA45 | Ceinewydd | Welsh Water | Check with your supplier |
| SA46 | Aberaeron | Welsh Water | Check with your supplier |
| SA47 | Ceinewydd | Welsh Water | Check with your supplier |
| SA48 | Lampeter | Welsh Water | Check with your supplier |
| SA61 | Hwlffordd | Welsh Water | Check with your supplier |
| SA62 | Tyddewi | Welsh Water | Check with your supplier |
| SA63 | Hwlffordd | Welsh Water | Check with your supplier |
| SA64 | Wdig | Welsh Water | Check with your supplier |
| SA65 | Abergwaun | Welsh Water | Check with your supplier |
| SA66 | Arberth | Welsh Water | Check with your supplier |
| SA67 | Arberth | Welsh Water | Check with your supplier |
| SA68 | Dinbych-y-Pysgod | Welsh Water | Check with your supplier |
| SA69 | Dinbych-y-Pysgod | Welsh Water | Check with your supplier |
| SA70 | Dinbych-y-Pysgod | Welsh Water | Check with your supplier |
| SA71 | Penfro | Welsh Water | Check with your supplier |
| SA72 | Pembroke Dock | Welsh Water | Check with your supplier |
| SA73 | Aberdaugleddau | Welsh Water | Check with your supplier |
| SA80 | Abertawe | Welsh Water | Check with your supplier |
| SA99 | Abertawe | Welsh Water | Check with your supplier |
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 SA
No water company covering SA publishes hardness figures as open data. The gap is named per district below so you know who to ask.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| SA1 | Not published by Welsh Water. Check with your supplier. | |||
| SA2 | Not published by Welsh Water. Check with your supplier. | |||
| SA3 | Not published by Welsh Water. Check with your supplier. | |||
| SA4 | Not published by Welsh Water. Check with your supplier. | |||
| SA5 | Not published by Welsh Water. Check with your supplier. | |||
| SA6 | Not published by Welsh Water. Check with your supplier. | |||
| SA7 | Not published by Welsh Water. Check with your supplier. | |||
| SA8 | Not published by Welsh Water. Check with your supplier. | |||
| SA9 | Not published by Welsh Water. Check with your supplier. | |||
| SA10 | Not published by Welsh Water. Check with your supplier. | |||
| SA11 | Not published by Welsh Water. Check with your supplier. | |||
| SA12 | Not published by Welsh Water. Check with your supplier. | |||
| SA13 | Not published by Welsh Water. Check with your supplier. | |||
| SA14 | Not published by Welsh Water. Check with your supplier. | |||
| SA15 | Not published by Welsh Water. Check with your supplier. | |||
| SA16 | Not published by Welsh Water. Check with your supplier. | |||
| SA17 | Not published by Welsh Water. Check with your supplier. | |||
| SA18 | Not published by Welsh Water. Check with your supplier. | |||
| SA19 | Not published by Welsh Water. Check with your supplier. | |||
| SA20 | Not published by Welsh Water. Check with your supplier. | |||
| SA31 | Not published by Welsh Water. Check with your supplier. | |||
| SA32 | Not published by Welsh Water. Check with your supplier. | |||
| SA33 | Not published by Welsh Water. Check with your supplier. | |||
| SA34 | Not published by Welsh Water. Check with your supplier. | |||
| SA35 | Not published by Welsh Water. Check with your supplier. | |||
| SA36 | Not published by Welsh Water. Check with your supplier. | |||
| SA37 | Not published by Welsh Water. Check with your supplier. | |||
| SA38 | Not published by Welsh Water. Check with your supplier. | |||
| SA39 | Not published by Welsh Water. Check with your supplier. | |||
| SA40 | Not published by Welsh Water. Check with your supplier. | |||
| SA41 | Not published by Welsh Water. Check with your supplier. | |||
| SA42 | Not published by Welsh Water. Check with your supplier. | |||
| SA43 | Not published by Welsh Water. Check with your supplier. | |||
| SA44 | Not published by Welsh Water. Check with your supplier. | |||
| SA45 | Not published by Welsh Water. Check with your supplier. | |||
| SA46 | Not published by Welsh Water. Check with your supplier. | |||
| SA47 | Not published by Welsh Water. Check with your supplier. | |||
| SA48 | Not published by Welsh Water. Check with your supplier. | |||
| SA61 | Not published by Welsh Water. Check with your supplier. | |||
| SA62 | Not published by Welsh Water. Check with your supplier. | |||
| SA63 | Not published by Welsh Water. Check with your supplier. | |||
| SA64 | Not published by Welsh Water. Check with your supplier. | |||
| SA65 | Not published by Welsh Water. Check with your supplier. | |||
| SA66 | Not published by Welsh Water. Check with your supplier. | |||
| SA67 | Not published by Welsh Water. Check with your supplier. | |||
| SA68 | Not published by Welsh Water. Check with your supplier. | |||
| SA69 | Not published by Welsh Water. Check with your supplier. | |||
| SA70 | Not published by Welsh Water. Check with your supplier. | |||
| SA71 | Not published by Welsh Water. Check with your supplier. | |||
| SA72 | Not published by Welsh Water. Check with your supplier. | |||
| SA73 | Not published by Welsh Water. Check with your supplier. | |||
| SA80 | Not published by Welsh Water. Check with your supplier. | |||
| SA99 | Not published by Welsh Water. Check with your supplier. | |||
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 SA 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 SA area?
There are 53 SA postcode districts, running from SA1 to SA99, and they contain 23,295 live postcodes across 147 sectors.
What towns does the SA postcode area cover?
SA covers Abertawe, Neath, Port Talbot, Gorseinon, Llanelli and Tyddewi. The area takes its name from Abertawe, and each district is listed with its settlement in the table on this page.
Which water company supplies SA postcodes?
Welsh Water supplies all 53 SA 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 SA1 and SA2 both say Abertawe?
SA1, SA2, SA3, SA5, SA6, SA80 and SA99 all serve Abertawe, 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 SA postcode map?
Yes. This page offers the SA 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.
Which councils cover the SA postcode area?
SA reaches into Carmarthenshire, Swansea, Neath Port Talbot, Pembrokeshire, Powys and Ceredigion. 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.
Why is there no SA30 postcode district?
SA30 is not in use. Postcode districts are allocated as sorting requirements change rather than numbered straight through, and a code that is retired or never brought into service is not reissued, so gaps in the sequence are normal.