SE22: 12 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in SE22, SE22 9AT, stands 12 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, SE22 0PN, stands 68 m above it.
- Ground at eight in ten of its postcodes: between 20 m and 54 m, measured from Ordnance Datum; the middle one stands at 30 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- In Southwark.