Small, medium-sized, and microenterprises are an essential part of the economy and development of Mexico. These businesses result from the need to provide supplies, goods, and services derived from the demand caused by large industries. However, lack of knowledge in environmental and safety and health concerns in the workplace causes that the total environmental impact from all of them becomes a serious pollution problem. Therefore, this paper includes a description of state-of-the-art Environmental Management Systems (EMS) and their application to propose a waste management plan in a cooperating microenterprise, based on the current Mexican legal framework and the findings considered as problem areas and growth opportunities. Even though it does not belong to the automotive industry, an auto repair shop was chosen as a case study because it is important for the service sector and the demand for these microenterprises. We decided to carry out this project since this branch of industry is in rapid growth, so the affectations and needs for these services are relevant now and in the near future. A word of advice was given, especially regarding the designation of a person to the role of identifying containers for every waste and keeping a documented record of their input and output, as well as allocating a physical space that allows having a delimited area for storage of hazardous waste, having trenches or gutters in the liquid storage area to take fluids to a retention pit in case of spillage, having signs indicating the danger of waste in visible places, but that avoids storing them for over six months, filling the containers up to more than 80% of their capacity, exceeding the maximum vertical stowage of three metal containers, using water to clean spills instead of using a proper absorbent such as sawdust, though it involves giving correct subsequent management for disposal. USW must be delivered to sanitation trucks sent by the government. HW must be delivered to collection centers authorized by SEDEMA. SW must be given proper treatment and final disposal according to SEDEMA.