Rainwater Harvesting needs to be adopted in areas where rainfall patterns are higher.
South African rainfall patterns are variable and on average receives about 450mm of rain annually.
The essential aspect of rainwater harvesting is catching it where it falls.
KwaZulu Natal can receive as high as 975mm annually which also makes KwaZulu Natal well suited for rainwater harvesting.
Statistically major cities in South Africa can receive more than 600mm of rain annually.