The hazardous waste in Mexico is generated from a wide range of activities, such as automotive workshops, this type of generators produces spent oils, filters, paint packs and different types of solids impregnated with fats, oils and solvents, all these With dangerous characteristics, the mismanagement of hazardous waste leads to environmental and health risks in humans and wildlife, so they require storage, transport and final disposal in a safe manner. A study was carried out in the mechanical workshops of the city of Los Mochis, Sinaloa, with the purpose of analyzing the handling of hazardous waste, especially used oils and solids impregnated with fats and oils. As evaluation instruments, a survey and a checklist were applied based on the specifications indicated in the Mexican environmental legislation on waste. 43% of the workshops do not have a temporary warehouse, 39% are not registered with the authority as generators of hazardous waste, 43% generate more than 100 kg of hazardous waste per month and 19% of these waste are spent oils. It was concluded that not all workshops work under the guidelines of the Mexican environmental legislation on waste, for which reason a more exhaustive vigilance is recommended by the competent authorities in the matter.