Tag Archives: Rainwater Tanks

This is a good question. Obviously a rainwater tank will not help if there is no rain at all. The thing is that most true drought occur inland whereas most of the population lives near the coast where it does rain. Sure we sometimes have dry seasons where we get below average rainfalls but even if you were to receive half of the average rainfall it should be enough to keep your tanks full for most of the year, if not all of it. This of course depends on the size of your rainwater tank and how much water you use but providing you have a reasonable size tank you should be right. Rainfall from 1990 – 1999 In Port Elizabeth 1990 441.8 Avg 569.41 1991 451.7 Lowest 441.8 1992 619.5 Highest 772.4 1993 638.7 1994 620.3 1995 513.1 1996 772.4 1997 539 1998 602.1 1999 495.5 For example, if you live in Port Elizabeth, where water restrictions are amongst the most severe the lowest rainfall in recent years was around 400mm, as shown in the table above for the years from 1990-1999. With a roof harvest area of 200 square metres you would collect around 80 000 litres. Port … Continue reading →