Dear Thomas, If you have a read through this Green Cape Report you will see that the reporter is using data for another country: http://greencape.co.za/assets/GreenCape-Water-Economy-MIR-2016.pdf What is also clear in this credible report that supports most data in the water sector, is that the WC government has not really erred as it has on an ongoing basis, look at previous similar annual reports, submitted its water needs to the national DWS.