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Downham, Lancashire
Up to High likelihood
Properties in BB7 4BP sit in the Environment Agency's High 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% | 1 | 1 |
| Medium | 1% – 3.3% | 5 | 5 |
| Low | 0.1% – 1% | 1 | 1 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a high-likelihood area has at least a 57% chance of flooding at least once.
The ground here sits at about 133 m above sea level and falls 47 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the south-east, 39.8 m higher.
Because properties in the high likelihood band; 1 recorded flood nearby; 122 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around BB7 4BP. 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 |
|---|---|---|
| Feb 2020 | 2020 February Flood Incident - Storm Ciara | ~87.4 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, 6 warnings nearby) · Desmond (2015, 2 warnings nearby) · Bert (2024, 2 warnings nearby) · Jocelyn (2024, 2 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Chatburn Pendle Avenue | hey | 1.6 km | 0.90 m | 1.22 m |
| Waterloo Road | Mearley Brook | 4.8 km | 1.53 m | 1.34 m |
| Bolton by Bowland Hellifield rd | Kirk Beck | 5.4 km | 0.70 m | 0.94 m |
| Low Moor | River Ribble | 6.2 km | 3.30 m | 4.60 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 |
|---|---|---|---|---|
| Chatburn Pumping Station | Chatburn Brook | 2.0 km | 75 (2024) | 646 |
| Rear Of No.4 Ribble Avenue Cso | Culverted Grindleton Brook | 3.0 km | 47 (2024) | 54 |
| Grindleton Wwtw | River Ribble/west Clough Brook | 3.1 km | 125 (2024) | 1,230 |
| West Bradford Ps | West Bradford Brook | 4.1 km | 55 (2024) | 265 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
No mapped flood-defence assets within 500 m of the postcode centre. 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 BB7 4BP — all in the BB7 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 BB7 district.