BA11 Flood Risk
In postcode district BA11 (Somerset), 335 of 21,470 properties (1.6%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that is the 525th highest count of 2,181 districts in England.
By bandProperties in BA11 by flood-risk band
| Risk band | Chance of flooding each year | All properties | Homes |
|---|---|---|---|
| High | 3.3% (1 in 30) or greater chance in any year | 192 | 93 |
| Medium | between 1% and 3.3% (1 in 100 to 1 in 30) chance in any year | 143 | 62 |
| Low | between 0.1% and 1% (1 in 1,000 to 1 in 100) chance in any year | 275 | 139 |
| Very low | less than 0.1% (1 in 1,000) chance in any year | 0 | 0 |
155 of the high- or medium-risk properties are homes and 90 are non-residential (shops, offices, farms, public buildings); the rest are unclassified. By share, BA11 ranks 764th of 2,084 districts with at least 500 properties.
Postcode sectorsWhere in BA11 the risk sits
| Sector | Properties | High | Medium | Low | Very low | High + medium share |
|---|---|---|---|---|---|---|
| BA11 1 | 4,104 | 72 | 75 | 39 | 0 | 3.6% |
| BA11 2 | 5,612 | 56 | 20 | 96 | 0 | 1.4% |
| BA11 3 | 3,342 | 14 | 21 | 28 | 0 | 1.0% |
| BA11 4 | 3,959 | 32 | 1 | 19 | 0 | 0.8% |
| BA11 5 | 3,069 | 11 | 22 | 80 | 0 | 1.1% |
| BA11 6 | 1,384 | 7 | 4 | 13 | 0 | 0.8% |
Recorded floodsPast floods mapped near BA11
The Environment Agency has mapped flood outlines on 20 dates near BA11 since 1960; the most recent started on 30 Mar 2015.
| Started | Place / name in the record | Source of flooding | Cause |
|---|---|---|---|
| 30 Mar 2015 | This represents flooding in the area in | Not recorded | Not recorded |
| 6 Feb 2014 | Mells to | Not recorded | Not recorded |
| 4 Jan 2014 | Lullington to | Main river | Channel capacity exceeded (no raised defences) |
| 24 Dec 2013 | Mells to | Main river | Channel capacity exceeded (no raised defences) |
| 10 Feb 2009 – 11 Feb 2009 | North Wessex 10 outlines | Main river | Channel capacity exceeded (no raised defences) |
| 13 Dec 2008 – 14 Dec 2008 | Som Frome Wallbridge Frome | Main river | Overtopping of defences |
| 28 Jan 1986 – 29 Jan 1986 | Frome Lullington | Main river | Channel capacity exceeded (no raised defences) |
| 31 Jan 1983 – 1 Feb 1983 | Som Frome Eden Vale Frome | Main river | Channel capacity exceeded (no raised defences) |
| 30 May 1979 | Som Frome Shawford Frome | Main river | Channel capacity exceeded (no raised defences) |
| 30 Apr 1979 | Mells river Great Elm | Drainage | Local drainage/surface water |
| 6 Mar 1978 | This represents flooding in the area in | Drainage | Local drainage/surface water |
| 2 Dec 1972 – 31 Dec 1972 | Somerset Frome Waterloo Frome 2 outlines | Main river, drainage | Channel capacity exceeded (no raised defences) |
| 11 Jul 1968 | Mells River Gardens Vobster Coleford | Main river | Channel capacity exceeded (no raised defences) |
| 10 Jul 1968 | SomFrome WithamF 2 outlines | Main river | Channel capacity exceeded (no raised defences) |
| 11 Jun 1968 | Nunney Brook Egford Cloford | Main river | Channel capacity exceeded (no raised defences) |
| 5 Nov 1966 – 6 Nov 1966 | Frome Waterloo Frome | Main river | Channel capacity exceeded (no raised defences) |
| 18 Dec 1965 – 19 Dec 1965 | Som Frome Freshford to Witham Friary | Main river | Channel capacity exceeded (no raised defences) |
| 5 Dec 1960 | Rodden Brook Rodden 3 outlines | Main river | Channel capacity exceeded (no raised defences) |
| 4 Dec 1960 – 5 Dec 1960 | Som Frome Witham Hall Farm 2 outlines | Main river, drainage | Channel capacity exceeded (no raised defences) |
| 27 Oct 1960 – 29 Oct 1960 | Somerset Frome Frome | Main river | Channel capacity exceeded (no raised defences) |
What this page shows, and what it misses
The Environment Agency's count of properties in each postcode that sit in areas of land at very low, low, medium or high risk of flooding from rivers and the sea, allowing for flood defences and their condition, added up here by postcode district and local authority. Every property in England is counted once, so the share is of all properties in the area.
It misses: surface water (heavy rain), groundwater, sewer and reservoir flooding; Wales, Scotland and Northern Ireland; and anything about a single building. A band describes the land a property stands on, not its floor level or flood protection, so it is not a forecast for any one home. Past floods come from the EA's Recorded Flood Outlines and are placed in the postcode district whose centre is nearest (within 12 km), so a flood near a boundary can be listed under a neighbour. Older records are patchy, and a flood with no outline is not listed.
Local authorities in BA11
- Somerset — 21,443 properties, 330 at high or medium risk
- Wiltshire — 26 properties, 5 at high or medium risk
Parishes in BA11: Beckington, Berkley, Buckland Dinham, Coleford, Dilton Marsh, Frome, Great Elm, Hemington, Kilmersdon, Leigh-on-Mendip, Lullington, Mells, Nunney, Rode, Selwood, Southwick, Tellisford, Trudoxhill, Wanstrow, Whatley, Witham Friary.
If you live in BA11
- Check your own address on gov.uk; it also covers surface water.
- Sign up for free flood warnings by phone, text or email: gov.uk/get-flood-warnings.
- See what is in force now on flood warnings UK, and river levels. Floodline: 0345 988 1188.
- Never walk or drive through flood water: why shallow water kills.
Nearby districts
FAQQuestions people ask
Is BA11 at risk of flooding?
In postcode district BA11 (Somerset), 335 of 21,470 properties (1.6%) are in areas at high or medium risk of flooding from rivers and the sea — at least a 1 in 100 chance in any year — per Environment Agency data updated 6 July 2026; that is the 525th highest count of 2,181 districts in England.
How many homes in BA11 are at high risk of flooding?
93 homes (residential properties) in BA11 are in areas at high risk (3.3% or greater chance each year) and 62 at medium risk, out of 16,753 homes, per Environment Agency data updated 6 July 2026. This counts rivers and the sea only, not surface water.
Has BA11 flooded before?
The Environment Agency has mapped flood outlines on 20 dates near BA11 since 1960; the most recent started on 30 Mar 2015.
How do I check the flood risk for my own address in BA11?
Use the government's long-term flood risk checker (check-long-term-flood-risk.service.gov.uk): it shows rivers and the sea, surface water, reservoirs and groundwater for one address. District figures here are totals and cannot tell you about a single home.
Flood risk counts: Environment Agency, Risk of Flooding from Rivers and Sea – Postcodes in Areas at Risk and Recorded Flood Outlines, used under the Open Government Licence v3.0. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this information are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.
Local authority of each postcode: Office for National Statistics postcode lookup (May 2026), licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. District centres and place names: postcodes.io (ONS/OS open data). Totals, ranks and grouping are Global Incident Tracker's own calculations; the Environment Agency does not endorse them.