FloodRadar
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Carlton, Barnsley
Up to High likelihood
Properties in S71 3HZ sit in the Environment Agency's High flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 10 | 10 |
| Medium | 1% – 3.3% | 2 | 2 |
| Low | 0.1% – 1% | 0 | 0 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a high-likelihood area has at least a 57% chance of flooding at least once.
The ground here sits at about 56 m above sea level and falls 43 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west, 40.4 m higher.
Because properties in the high likelihood band; 3 recorded floods nearby; 71 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around S71 3HZ. 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 | Recorded flood | Approx. distance |
|---|---|---|
| Feb 2022 | 2022 February Flood Incident -Storm Dudley, Eunice and Franklin | ~20.4 km |
| Jan 2021 | 2021 January Flood Incident - Storm Christoph | ~35.6 km |
| Feb 2020 | 2020 February Flood Incident - Storm Dennis | ~37.7 km |
EA Recorded Flood Outlines — absence of a record never proves a place has not flooded. The full report tests whether any extent covered the exact spot.
Babet (2023, 7 warnings nearby) · Ciara (2020, 3 warnings nearby) · Dennis (2020, 2 warnings nearby) · Franklin (2022, 2 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Barnsley | River Dearne | 3.0 km | 1.25 m | 2.75 m |
| Cundy Cross | River Dearne | 3.8 km | 2.20 m | 3.84 m |
| Darton | River Dearne | 5.1 km | 1.30 m | 2.87 m |
| Worsbrough | River Dove | 6.7 km | 1.20 m | 2.19 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 |
|---|---|---|---|---|
| Laithes Lane Cso | Trib Of Cudworth Dyke | 0.1 km | 12 (2024) | 136 |
| Church Hill Cso | Royston Scott Dike | 1.1 km | 0 (2024) | 0 |
| Royston (carlton-shaw Lane) | Shaw Dyke | 1.4 km | 11 (2024) | 24 |
| Pools Lane Cso | Pools Dike | 1.6 km | 18 (2024) | 80 |
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.
At-risk postcodes near S71 3HZ — all in the S71 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. 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. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. 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 S71 district.