CR0: 24 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in CR0, CR0 4GG, stands 24 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, CR0 0AL, stands 158 m above it.
- Ground at eight in ten of its postcodes: between 40 m and 110 m, measured from Ordnance Datum; the middle one stands at 55 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Croydon; partly in Sutton.