Does L9 flood?

Yes — parts of the L9 district carry real flood risk: 2 of its 12 at-risk postcodes reach the Environment Agency's High likelihood band. The L9 postcode district covers Walton, Fazakerley West, close to Aintree, Bootle, Sefton, and surrounding villages in parts of Liverpool City Region and Lancashire.

12 postcodes in the L9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 2 high, 2 medium, 8 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 L9 postcodes are at risk?

L9 9AN up to High L9 9AW up to High L9 9AQ up to Medium L9 9BL up to Medium L9 2BR up to Low L9 2BS up to Low L9 2BY up to Low L9 7AU up to Low L9 9AA up to Low L9 9AR up to Low L9 9AX up to Low L9 9DD up to Low

Rivers and flooding history near L9

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

Kirkby on the River Alt — 2.9 km away, highest on record 2.22m
Dovers Bridge on the Dovers Brook — 5 km away, highest on record 2.59m
Davis Road on the River Birket — 10.6 km away, highest on record 3.27m
Dyers lane on the Sandy Brook — 12 km away, highest on record 1.32m

124 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (65 at warning level or above), most recently 20 August 2026. Warnings cover flood areas, not individual addresses.

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

Mill Square, Aintree (2015) — about 2.4 km from the centre
RALT (1997) — about 0.8 km from the centre

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

🏠 Buying or renting in L9? 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

L10 L12 L6 L5 L4 L3 L16 L2

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.