Does BL6 4DF flood?

Up to Very low likelihood

Properties in BL6 4DF sit in the Environment Agency's Very 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%	0	0
Very low	below 0.1%	1	1

Over a 25-year mortgage, a property in a very low-likelihood area has less than a 3% chance of flooding at least once.

The ground around BL6 4DF

The ground here sits at about 113 m above sea level and falls 29 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west-south-west, 0.7 m higher.

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Get the full flood report for BL6 4DF — £19 Free preview first · instant access · no account needed The detail below — flood history, warnings, rivers, overflows — is part of FloodRadar's property flood-risk report. The official band above is free; the preview shows more before you decide.

Inside the full report for BL6 4DF

FloodRadarProperty Flood-Risk Report

BL6 4DF

Moderate flood risk — investigate further

Because properties in the very low likelihood band; 6 recorded floods nearby; 54 official warnings since 2006.

B Today — indicative grade (A best → E)

··· By the 2050s — EA climate scenario (in the full report)

⚑ Official warning within 10 km: Yes ⚑ Recorded flood nearby: Yes ⚑ Flood defences within 500 m: Yes ⚑ In flood zone 2 or 3: ···

Rivers & sea

Up to Very low

Surface water

···

Groundwater

Not assessed

Historic flooding

Recorded nearby

Warning history · flood map with building picker · 2050s view · insurance outlook · every dataset receipt — 18 sections

Flood-risk map of this area

Environment Agency flood-likelihood cells

High (>3.3%/yr) Medium Low Very low Marker = postcode centre Base map © OpenStreetMap contributors

Rivers & sea likelihood · illustrative

Surface water (flash flooding) · illustrative

Flood Zones 2 & 3 (planning) · illustrative

2050s projection (climate) · illustrative

The map above shows the real EA rivers & sea likelihood cells around BL6 4DF. 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.

Official flood warnings near BL6 4DF

flood alerts & warnings within 10 km since 2012

of them full flood warnings or severe warnings

2025

most recent warning nearby (2025-09-20)

Warnings cover flood areas, not individual addresses.

Recorded floods near this postcode

Date	Recorded flood	Approx. distance
Jan 2008	EA01313_21 January 2008_Bessy Brook_Lostock Juncti	~0.3 km
Dec 2007	EA01313_06_December_2007_Bessy_Brook_5SudburyDrive	~0.3 km
Jun 2003	BESS	~0.5 km
Jun 2002	EA01313_14 June 2002_Bessy Brook_44LostockJnctnLn	~0.3 km
Jun 2002	EA01313_14 June 2002_Bessy Brook_12SudburyClose	~0.3 km
Jun 2002	MIDD	~0.5 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.

Named storms that brought flooding here

Ciara (2020, 3 warnings nearby) · Christoph (2021, 3 warnings nearby) · Bert (2024, 2 warnings nearby) · Fergus (2023, 2 warnings nearby)

The rivers that matter for BL6 4DF

Gauge	River	Distance	Typical high	Highest on record
Bessy Brook	Bessy Brook	0.3 km	1.08 m	1.78 m
Horwich Pearl Brook	Pearl Brook	4.0 km	0.70 m	1.47 m
Atherton Woodland Drive	Carr Brook	4.7 km	0.75 m	0.82 m
Threadfold Way	Eagley Brook	6.5 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.

Storm overflows within 5 km

Overflow	Discharges into	Distance	Spills	Hours
Lostock Junction Lane Cso	Bessy Brook	0.4 km	0 (2024)	0
Regent Road (bolton) Cso	Bessy Brook Via Sws	0.4 km	45 (2024)	74
Heaton Bridge Cso Bolton	Middle Brook	0.9 km	14 (2024)	5
St Johns Rd	Middle Brook	1.1 km	4 (2024)	9

Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.

Flood defences

24 mapped flood-defence assets within 500 m — nearest ~70 m (natural high ground, wall). Defences reduce risk, never remove it.

What the full property report adds

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.

Flood risk at nearby postcodes

BL6 4AA up to Low BL6 4AE up to High BL6 4AF up to Very low BL6 4AG up to Very low BL6 4BA up to Low BL6 4BF up to Very low BL6 4BH up to Low BL6 4BJ up to Low BL6 4BR up to Low BL6 4DA up to Medium BL6 4DB up to Low BL6 4DE up to Low

At-risk postcodes near BL6 4DF — 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. 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.