Does M9 flood?

Yes — parts of the M9 district carry real flood risk: 11 of its 34 at-risk postcodes reach the Environment Agency's High likelihood band. The M9 postcode district covers Harpurhey, Crumpsall, Higher Blackley, close to Manchester, Ancouts, Broughton, and surrounding villages in Greater Manchester.

34 postcodes in the M9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 11 high, 3 medium, 20 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

Free preview first · full report £19

Which M9 postcodes are at risk?

M9 1SP up to High M9 4NF up to High M9 4NX up to High M9 4PA up to High M9 5SP up to High M9 5SX up to High M9 8AW up to High M9 8AZ up to High M9 8NJ up to High M9 8NT up to High M9 8ZA up to High M9 4LL up to Medium M9 8FP up to Medium M9 8NN up to Medium M9 4PB up to Low M9 5SU up to Low M9 5TH up to Low M9 5TP up to Low M9 5TQ up to Low M9 5TR up to Low M9 8BZ up to Low M9 8EP up to Low M9 8ES up to Low M9 8EZ up to Low M9 8FE up to Low M9 8FS up to Low M9 8FW up to Low M9 8GQ up to Low M9 8NH up to Low M9 8NP up to Low M9 8PU up to Low M9 8PX up to Low M9 8QA up to Low M9 8RN up to Low

Rivers and flooding history near M9

The rivers that matter here, each monitored live on FloodRadar:

Manchester Racecourse on the River Irwell — 3.9 km away, highest on record 5.67m
London Road on the River Medlock — 4.6 km away, highest on record 1.80m
Littleton Road River on the River Irwell — 4.7 km away, highest on record 4.98m
Blackford Bridge on the River Roch — 7.4 km away, highest on record 3.36m

131 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (60 at warning level or above), most recently 15 December 2025. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

Manchester Harpurhey - NYE/NYD 25 (2025) — about 0.9 km from the centre
Collyhurst Road, (2019) — about 2.5 km from the centre
Waterloo Street (2019) — about 0.3 km from the centre
Higher Blackley (2015) — about 2.1 km from the centre

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in M9? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

M8 M11 M7 M12 M6 M13 M5 M14

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © 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.