Hundreds of indigenous Mayo ejidatarios became members of the SICAE (Sociedad de Interés Colectivo Agrícola Ejidal) sugarcane cooperative in North-West Mexico in the 1930s, gaining control of irrigated lands and marginalising non-members, called ‘individualists’, by the 1940s. This article focuses on how indigenous individualists of Los Goros and El Teroque ejidos navigated the SICAE's control of water and attempts to annex their lands. Mayo individualists’ resistance to corrupt ejidal leadership and the SICAE cooperative allowed them to influence local water development decisions. These individualist Mayo experiences exemplify how hydraulic social mobilisation became an indigenous people's strategy of survival in mid-twentieth-century Mexico.