South Wairarapa

The district comprises the floodplain of the Ruamahanga River and the associated Lake Wairarapa.  
 
The Wairarapa fault runs along to the west of the district. This fault is one of five major active faults in the Wellington region. The Wairarapa Fault last ruptured in 1855, generating an 8.2 magnitude earthquake that caused extensive damage and killed between 7 and 9 people.