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Does CO2 flood?

Yes — parts of the CO2 district carry real flood risk: 4 of its 48 at-risk postcodes reach the Environment Agency's High likelihood band. The CO2 postcode district covers Greenstead, Old Heath and The Hythe, Marks Tey and Layer, Castle, close to Wivenhoe, Beacon End, Thorington Street, and surrounding villages in parts of Essex and Suffolk.

48 postcodes in the CO2 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 4 high, 4 medium, 10 low, 30 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).

Free preview first · full report £19

Which CO2 postcodes are at risk?

CO2 0JZ up to High CO2 8JB up to High CO2 8JX up to High CO2 8XY up to High CO2 0LZ up to Medium CO2 8AA up to Medium CO2 8JY up to Medium CO2 8ZA up to Medium CO2 0YB up to Low CO2 8FQ up to Low CO2 8HT up to Low CO2 8HU up to Low CO2 8HW up to Low CO2 8HZ up to Low CO2 8JZ up to Low CO2 8RT up to Low CO2 8YQ up to Low CO2 8ZB up to Low CO2 8EW up to Very low CO2 8FN up to Very low CO2 8FR up to Very low CO2 8FX up to Very low CO2 8GE up to Very low CO2 8GL up to Very low CO2 8GN up to Very low CO2 8GQ up to Very low CO2 8GT up to Very low CO2 8GY up to Very low CO2 8HH up to Very low CO2 8JD up to Very low CO2 8JE up to Very low CO2 8JF up to Very low CO2 8JG up to Very low CO2 8JP up to Very low CO2 8JR up to Very low CO2 8JS up to Very low CO2 8JT up to Very low CO2 8JU up to Very low CO2 8LA up to Very low CO2 8LD up to Very low CO2 8LE up to Very low CO2 8LG up to Very low CO2 8LH up to Very low CO2 8XZ up to Very low CO2 8YR up to Very low CO2 8YS up to Very low CO2 8YZ up to Very low CO2 8ZD up to Very low

Rivers and flooding history near CO2

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

15 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (15 at warning level or above), most recently 24 November 2023. 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.

🏠 Buying or renting in CO2? 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

CO1 CO3 CO4 CO5 CO6 CO7 CO8 CO9

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.