Microplastics has become a global environmental concern with detrimental consequences to human health and ecosystems at large. This research assesses the sources and implications of microplastics released through the activities of selected mechanical recycling facilities in Alimosho Local Government Area of Lagos. A mixed research method was employed. Fourier transform infrared (FTIR) spectroscopy was used to analyse wastewater samples collected at point source from three recycling facilities while a structured questionnaire was administered through convenience sampling techniques. Both methods were used to determine the sources and pathways of microplastic release, identify key influencing factors within recycling facilities, and assess the environmental and health impacts on the local community. FTIR results revealed distinct microplastic compositions, including polyethene terephthalate (PET), high-density polyethene (HDPE), and low-density polyethene (LDPE), within selected recycling facilities. Results from the survey responses showed that the predominant recycling processes identified included sorting, shredding, and washing, with additional variations such as extrusion, pelletization, and baling, particularly observed in facility A. The results further highlighted the shredding process as a significant contributor to microplastic release, emphasising the need for operational improvements. Despite significant participation in recycling activities, a notable percentage of the respondents lacked prior knowledge about microplastic release from recycling processes. However, there was a widespread acknowledgment among respondents that their facilities could potentially contribute to microplastic release. The study recommends the implementation of regulations governing microplastic release in the recycling process; public awareness campaigns to emphasize the dangers of microplastics and promote responsible recycling practices; training programs for recycling facility staff can foster a deeper understanding of microplastic pollution and its mitigation.