Does HA6 flood?

Yes — parts of the HA6 district carry real flood risk: 1 of its 4 at-risk postcodes reach the Environment Agency's High likelihood band. The HA6 postcode district covers Moor Park & Eastbury, Northwood, Northwood Hills, close to Rickmansworth, Pinner, Croxley Green, and surrounding villages in parts of England and Hertfordshire.

4 postcodes in the HA6 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 1 high, 3 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 HA6 postcodes are at risk?

HA6 2ET up to High HA6 1HN up to Low HA6 1QW up to Low HA6 2BG up to Low

Rivers and flooding history near HA6

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

Moor Lane on the River Colne — 2.4 km away, highest on record 8.23m
Woodhall Avenue on the River Pinn — 3.1 km away, highest on record 0.82m
Waxwell Lane on the River Pinn — 3.2 km away, highest on record 1.41m
Croxley Green on the River Gade — 3.2 km away, highest on record 0.42m

204 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (22 at warning level or above), most recently 27 August 2026. Warnings cover flood areas, not individual addresses.

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

EA06FebruaryWinter2024 (2024) — about 4.1 km from the centre
January 2021 flooding — about 2.9 km from the centre
February 2018 flooding — about 4.1 km from the centre
June 2016 flooding — about 2.8 km from the centre

🏠 Buying or renting in HA6? 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

HA5 HA7 HA4 HA8 HA3 HA9 HA2 HA1

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.