Lack of foresight into using underground springs has been sadly lacking, that water was used by the early settlers in the Cape and somehow they build a city and forget to plan growth requirements.
Water being a basic necessity it is a sad state of affairs to land up in this situation, even desalination plants have not been planned for.
Best suggestion from my side, is to ban bottled water in plastic, start looking after our rivers by keeping them clean IMHO.