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No property in an EA risk band
No property in DT11 8SL appears in the Environment Agency's rivers-and-sea flood-risk dataset. That dataset covers one of five flood sources. It is area-level, it covers rivers and the sea only, and it is never proof a place cannot flood — surface water, groundwater, sewers and reservoirs are assessed separately. See the at-risk postcodes in DT11 or get the full picture below.
DT11 8SL gets about 943 mm of rain a year on average (wettest month November, 115 mm; driest May, 54 mm). That is 19% drier than the UK as a whole, which averages 1,163 mm a year.
A thirty-year average for the surrounding area, not a measurement at this address and not a flood risk on its own: a dry area floods when a storm sits over it, and a wet one may drain away perfectly well. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.0 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
The ground here sits at about 67 m above sea level and falls 66 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north-east, 10.4 m higher.
The river map has no watercourse within 1 km of the centre of DT11 8SL.
That means this spot is not on the river map, not that there is no water here: Ordnance Survey’s river map (OS Open Rivers) leaves out small streams, ditches and culverts. Contains OS data © Crown copyright and database rights 2026.
Because 5 recorded flood outlines mapped nearby; 256 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around DT11 8SL. 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.
Warnings cover flood areas, not individual addresses.
| Date | Mapped flood extent | Approx. distance |
|---|---|---|
| Oct 2021 | Blandford Oct 2021 | ~1.7 km |
| Jan 2014 | Flood Extents_Winter 2013 to 2014 | ~6.0 km |
| Feb 2009 | Stour Flood 24 | ~2.3 km |
| Dec 1979 | Dec 1979 Stour | ~6.1 km |
| May 1979 | May 1979 Stour | ~2.1 km |
These are extents the Environment Agency has mapped, not a list of every flood. Records, not floods: no outline on the record is not evidence a place has not flooded. The full report tests whether any extent covered the exact spot.
2013-14 UK winter floods (2013, 15 warnings nearby) ▶ replay it here · Henk (2024, 9 warnings nearby) ▶ replay it here · Dennis (2020, 5 warnings nearby) ▶ replay it here · Bert (2024, 4 warnings nearby) ▶ replay it here
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Blandford | River Stour | 2.5 km | 1.10 m | 2.78 m |
| Stourpaine Havelins | River Iwerne | 5.5 km | 0.59 m | 1.56 m |
| Stourpaine | River Iwerne | 5.5 km | 0.42 m | 0.63 m |
| Badbury Rings | Groundwater Level | 7.6 km | 32.00 m | 42.60 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Langton Road Pumping Station | River Stour(s) | 2.0 km | 2 (2025) | 0 |
| Bournemouth Road Pumping Station | The River Stour | 2.4 km | 0 (2025) | 0 |
| Tarrant Crawford Stw | Stour (s) | 4.1 km | 8 (2025) | 85 |
| Water Lane Pumping Station | Tributary Of River Stour | 5.0 km | 6 (2025) | 55 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
No mapped flood-defence assets within 500 m of the postcode centre. Defences reduce risk, never remove it.
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.
Flooded here before? Log it and see what your floods had in common.
At-risk postcodes near DT11 8SL — all in the DT11 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 (England); live overflow status © the water companies, incl. Dŵr Cymru Welsh Water and Scottish Water. 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 DT11 district.