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This technical report evaluates water use efficiency and the application of the Alliance for Water Stewardship (AWS) standard among stone fruit farmers in the Western Cape of South Africa. It combines orchard-scale biophysical measurements of peach and plum trees with farm-scale assessments of water balance and quality across nine volunteer farms in the Breede catchment. The report finds that while Western Cape farmers are significantly more water-efficient than global averages, there are local opportunities to reduce water use by up to 20-30% through improved irrigation scheduling and the use of correct crop factors. It also details the implementation of the AWS standard, identifying drought, social risks (such as infrastructure theft), and regulatory uncertainty as primary concerns for farmers.