Does S66 flood?

Yes — parts of the S66 district carry real flood risk: 6 of its 10 at-risk postcodes reach the Environment Agency's High likelihood band. The S66 postcode district covers Tickhill & Wadsworth, Maltby East, Hellaby & Maltby West, close to Conisbrough, Mexborough, Dearne Washlands, and surrounding villages in parts of South Yorkshire and Nottinghamshire.

10 postcodes in the S66 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 6 high, 1 medium, 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).

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Which S66 postcodes are at risk?

S66 7QY up to High S66 7RB up to High S66 7RD up to High S66 8NB up to High S66 8NN up to High S66 8NU up to High S66 8HN up to Medium S66 3EW up to Low S66 7RJ up to Low S66 8NW up to Low

Rivers and flooding history near S66

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

Conisbrough on the Kearsley Brook — 6.6 km away, highest on record 1.31m
Whiston Brook on the Whiston Brook — 8.8 km away, highest on record 2.30m
Sprotbrough on the River Don — 9.1 km away, highest on record 4.72m
Blyth on the River Ryton — 10.5 km away, highest on record 2.32m

102 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (30 at warning level or above), most recently 30 August 2026. Warnings cover flood areas, not individual addresses.

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

2022 February Flood Incident -Storm Dudley, Eunice and Franklin (2022) — about 14.8 km from the centre
2021 January Flood Incident - Storm Christoph (2021) — about 47.9 km from the centre
2020 February Flood Incident - Storm Dennis (2020) — about 40.1 km from the centre

🏠 Buying or renting in S66? 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

S65 S64 S63 S62 S70 S61 S71 S60

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.