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Does Potters Bar flood?

Hertfordshire
24postcodes in the EA rivers-and-sea dataset
12river gauges within 10 km
12years with a mapped flood record within 5 km
🏠 Thinking of buying in Potters Bar? Get the detailed Property Flood-Risk Report for any Potters Bar postcode — official risk band, recorded floods since 1703, warning history, river behaviour and nearby storm overflows. £19 one-off, instant. Learn more →

What the Environment Agency's rivers-and-sea flood-risk data says about Potters Bar

Ordnance Survey places 24 postcodes in Potters Bar in the Environment Agency's rivers-and-sea flood-risk dataset (Risk of Flooding from Rivers and Sea). Each postcode is counted once, under the worst band any of its properties reaches; together they hold 138 properties in the EA dataset's likelihood bands.

EA likelihood bandPostcodes (worst band)Properties in the EA datasetof which homes
High186659
Medium22019
Low45244
Very low000
All bands24138122

This dataset covers flooding from rivers and the sea only — one of five flood sources. Surface water, groundwater, sewers and reservoirs are assessed separately, so a postcode missing from it is not proof that a place cannot flood. The band describes the land around properties (allowing for defences), not any single address and not today's conditions.

Rivers and live river levels near Potters Bar

Environment Agency gauges within 10 km of Potters Bar watch Mimmshall Brook, Pymmes Brook, River Colne, Borehamwood Brook, Dollis Brook, Salmon Brook, Rags Brook, Radlett Brook, River Lee.

Distances are from the middle of Potters Bar's at-risk postcodes. Tidal and structure gauges are shown as readings only — the tide and sluice gates move them, not floods. A gauge with no recent reading shows no level.

The watercourse nearest Potters Bar

Two mapped watercourses are about the same distance from the middle of Potters Bar's at-risk postcodes: Mount Grace Road Drain (about 530 m) and Potters Bar Brook (about 550 m), so this page cannot say which one is nearer to you.

Distances along the river are from the point on each watercourse nearest the middle of Potters Bar's at-risk postcodes. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.

Flood warning areas near Potters Bar

14 Environment Agency flood warning areas lie within 10 km of Potters Bar. The EA has issued 268 flood warnings and alerts for them since 2006, most recently on 24 Oct 2026.

Recorded floods near Potters Bar

Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of Potters Bar, most recent first. Records, not floods: no outline on the record is not evidence a place has not flooded. See them on the map →

…and 6 earlier recorded floods on the map.

Rainfall near Potters Bar

Potters Bar gets about 674 mm of rain a year on average (wettest month November, 72 mm; driest March, 40 mm). That is 42% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.5 km from the place centre.

The nearest rain gauge, Rainfall station (3.2 km away), recorded 3.8 mm in the last 24 hours and 53.6 mm in the last 7 days (latest reading 26 min ago).

At-risk postcodes in Potters Bar

Every postcode Ordnance Survey places in Potters Bar that appears in the EA's rivers-and-sea dataset, worst band first. Each links to its own flood-risk page.

High likelihood (18)

EN6 1BXEN6 1DHEN6 1DQEN6 1QYEN6 1UTEN6 2AWEN6 2EEEN6 2EFEN6 2LLEN6 2LSEN6 2LTEN6 2LUEN6 3JNEN6 5NXEN6 5PZEN6 5QDEN6 5QHEN6 5QJ

Medium likelihood (2)

EN6 1DDEN6 1XN

Low likelihood (4)

EN6 2EAEN6 2HUEN6 2HXEN6 2NW

Postcode districts

EN6 · 24

Sources

FloodRadar summarises public flood data. It is not a flood-risk survey of any property, and it does not replace official GOV.UK flood warnings or the GOV.UK long-term flood risk service.

Flood-risk bands: © 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, flood warning areas and warning history © Environment Agency copyright and/or database right 2025. Licensed under the Open Government Licence v3.0.

River levels and rainfall: Environment Agency real-time flood-monitoring data, updated every 15 minutes (Open Government Licence v3.0).

Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.

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.

All data sources & licences