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Up to Low likelihood
Properties in BL6 4ED sit in the Environment Agency's Low flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 0 | 0 |
| Medium | 1% – 3.3% | 0 | 0 |
| Low | 0.1% – 1% | 1 | 1 |
| Very low | below 0.1% | 1 | 0 |
Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.
The ground here sits at about 113 m above sea level and falls 64 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west-north-west, 1.9 m higher.
Because properties in the low likelihood band; 6 recorded floods nearby; 54 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around BL6 4ED. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Recorded flood | Approx. distance |
|---|---|---|
| Jan 2008 | EA01313_21 January 2008_Bessy Brook_Lostock Juncti | ~0.4 km |
| Dec 2007 | EA01313_06_December_2007_Bessy_Brook_5SudburyDrive | ~0.5 km |
| Jun 2003 | BESS | ~0.7 km |
| Jun 2002 | EA01313_14 June 2002_Bessy Brook_44LostockJnctnLn | ~0.4 km |
| Jun 2002 | EA01313_14 June 2002_Bessy Brook_12SudburyClose | ~0.4 km |
| Jun 2002 | MIDD | ~0.6 km |
EA Recorded Flood Outlines — absence of a record never proves a place has not flooded. The full report tests whether any extent covered the exact spot.
Ciara (2020, 3 warnings nearby) · Christoph (2021, 3 warnings nearby) · Bert (2024, 2 warnings nearby) · Fergus (2023, 2 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Bessy Brook | Bessy Brook | 0.4 km | 1.08 m | 1.78 m |
| Horwich Pearl Brook | Pearl Brook | 3.9 km | 0.70 m | 1.47 m |
| Atherton Woodland Drive | Carr Brook | 5.0 km | 0.75 m | 0.82 m |
| Threadfold Way | Eagley Brook | 6.3 km | 2.20 m | 1.71 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Lostock Junction Lane Cso | Bessy Brook | 0.6 km | 0 (2024) | 0 |
| Regent Road (bolton) Cso | Bessy Brook Via Sws | 0.6 km | 45 (2024) | 74 |
| Heaton Bridge Cso Bolton | Middle Brook | 0.9 km | 14 (2024) | 5 |
| St Johns Rd | Middle Brook | 1.3 km | 4 (2024) | 9 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
16 mapped flood-defence assets within 500 m — nearest ~48 m (wall, natural high ground). Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near BL6 4ED — all in the BL6 district.
© Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map 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. Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the BL6 district.