WC postcode district map, London

Where the WC districts sit

Where WC sits

The whole area sits inside Greater London, which is unusual at this size.

Water supply across WC

All 14 WC districts are supplied by Thames Water. That makes WC simple in a way many areas are not: one company, one set of rules, one status to check.

Thames Water has a hosepipe ban in force from 23 July 2026, covering the whole of WC.

The shape of the WC area

WC2H is the largest district with 347 postcodes around London, and WC1R the smallest with 79. The area divides into 41 postcode sectors.

District by district: WC1A serves London, WC1B serves London, WC1E serves London, WC1H serves London, WC1N serves London, WC1R serves London, WC1V serves London, WC1X serves City of London, WC2A serves London, WC2B serves London, WC2E serves London, WC2H serves London, WC2N serves London and WC2R serves London.

Several districts share a settlement, which is a common source of confusion when a form rejects an address: WC1A, WC1B, WC1E, WC1H, WC1N, WC1R, WC1V, WC2A, WC2B, WC2E, WC2H, WC2N and WC2R all point at London.

What borders WC

WC sits next to EC (City of London) to the east, W (London) to the west, N (City of London) to the north, NW (London) to the north west and SW (City of Westminster) to the south west.

Its neighbours run in 5 different directions, so WC is landlocked by other postcode areas on most sides.

WC districts, settlements and water supply

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 WC

No water company covering WC publishes hardness figures as open data. The gap is named per district below so you know who to ask.

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 WC 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.

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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