CR5: 67 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in CR5, CR5 2FQ, stands 67 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, CR5 1SX, stands 164 m above it.
- Ground at eight in ten of its postcodes: between 81 m and 161 m, measured from Ordnance Datum; the middle one stands at 119 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Croydon; partly in Sutton.