Farmers purchasing water in market transactions to finish an irrigation season or to ensure water supply for perennial crops might pay prices that exceed USD 100 per m3 for a portion of their irrigation supply (Wichelns, 2010b). It is equivalent to a water tariff a term commonly used in the domestic/urban water sector when differential charges are set. Sometimes the term water charge is replaced by the term irrigation service fee, as the term charge is disliked by some policy makers as it suggests water is taxed.