Yes — parts of the CM3 district carry real flood risk: 49 of its 157 at-risk postcodes reach the Environment Agency's High likelihood band. The CM3 postcode district covers South Woodham-Elmwood and Woodville, Purleigh, Broomfield and The Walthams, South Woodham-Chetwood and Collingwood, close to Sandon, Wickford, Chelmsford, and surrounding villages in Essex.
157 postcodes in the CM3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 49 high, 19 medium, 37 low, 52 very 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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The rivers that matter here, each monitored live on FloodRadar:
61 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (28 at warning level or above), most recently 7 February 2026. Warnings cover flood areas, not individual addresses.
Recorded flood extents near the district (Environment Agency record):
Records, not floods: no outline on the record is not evidence a place has not flooded.
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.