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The objective was to determine the productivity (P) and efficiency (E) of water (A) used in bovine milk production, both in physical (F), economic (E) and social (S) terms in the Rural Development District (RDD) Laguna-Coahuila, Mexico in low (LRV) and high yielding (HRV) dairy herds, using an economic methodology based on the use of mathematical equations fed with commercial scale data. The results, for both types of producing wombs, in the same order, showed the following indexes: PFA 0.385 and 0.6864 liters of milk per m3 of water, PEA had USD 12,731 and USD 22,698 of profit per hm3 of...