EC2M: 4.4 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in EC2M, EC2M 7EA, stands 4.4 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, EC2M 1PF, stands 12 m above it.
- Ground at eight in ten of its postcodes: between 12 m and 18 m, measured from Ordnance Datum; the middle one stands at 14 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in City of London; partly in Islington.