E17: 0.8 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in E17, E17 8HB, stands 0.8 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, E17 3PR, stands 45 m above it.
- Ground at eight in ten of its postcodes: between 10 m and 33 m, measured from Ordnance Datum; the middle one stands at 19 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- In Waltham Forest.