EN8: 14 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in EN8, EN8 8QZ, stands 14 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, EN8 8EX, stands 24 m above it.
- Ground at eight in ten of its postcodes: between 20 m and 25 m, measured from Ordnance Datum; the middle one stands at 21 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- In Enfield.