RM10: 19 of 582 postcodes stand below a spring high tide

The ground at 19 of RM10's 582 postcodes (3%) is lower than an ordinary spring high tide at London Bridge (3.9 m above Ordnance Datum).

• Ground at eight in ten of its postcodes: between 5.0 m and 15 m, measured from Ordnance Datum; the middle one stands at 8.2 m.
• 77 of 582 stand lower than the 1953 tide (5.41 m).
• 11 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• In Barking and Dagenham.