DA6: 15 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in DA6, DA6 7PY, stands 15 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, DA6 7DJ, stands 54 m above it.
- Ground at eight in ten of its postcodes: between 40 m and 57 m, measured from Ordnance Datum; the middle one stands at 49 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- In Bexley.