A groundbreaking study published in New Contaminants reveals the unsettling presence of microplastics in borehole water around the Sokoto Cement Factory in northern Nigeria, highlighting an overlooked pathway of groundwater contamination linked to industrial activities. This discovery challenges the conventional assumption that groundwater is largely shielded from surface pollutants, underscoring the vulnerability of water sources heavily relied upon by local communities.
Researchers collected samples from boreholes situated north, south, east, and west of the cement plant, systematically quantifying microplastic load, characterizing particle morphology, and identifying polymer types using advanced ATR-FTIR spectroscopy. Results showed ubiquitous microplastic contamination, with concentrations ranging between 150 ± 10 and 460 ± 20 particles per liter, the highest levels found in the northern zone. This spatial variation is thought to arise from prevailing wind patterns, surface runoff dynamics, and local hydrogeology.
Microplastics detected encompassed a range of morphologies including fibers, films, microbeads, foams, and pellets. Notably, fibers dominated—comprising 100% of northern particulate matter and 42% in southern samples—suggesting airborne synthetic textile fibers or cement additive fragments as significant contributors. Particle sizes predominantly fell between 100 and 1,000 micrometers, with transparent and white hues most common, hinting at widespread environmental dispersal and degradation of clear plastic materials.
Polymer analysis identified polyethylene as the most prevalent plastic type across all samples, followed by polyethylene terephthalate, polyvinyl chloride, polypropylene, and nylon, the latter exclusive to southern boreholes. The presence of these polymers points to various industrial and urban plastic sources, including packaging waste degradation, synthetic additives in cement, and vehicular tire wear contributing to groundwater contamination.
Health risk assessments employing a pollution load index and polymer risk index placed all sampled locations in Risk Level IV, the highest hazard category in the screening system used. While this index does not substitute for comprehensive toxicological evaluation, it signals a pressing need for deeper investigation into chronic exposure implications for populations consuming this groundwater.
The study’s corresponding author, Tajudeen Olanrewaju Yahaya, emphasized that these findings “point to a clear need for closer monitoring” of microplastic pollution near industrial sites. The authors advocate for enhanced waste management strategies, minimizing plastic leakage from packaging, and rigorous routine testing of groundwater to safeguard public health.
Potential contamination sources outlined include degradation of plastic packaging, microplastic additives in cement, runoff from industrial activities, plastic waste mishandling, tire abrasion, and atmospheric deposition. The research thus positions cement manufacturing as an emerging, previously under-recognized contributor to microplastic pollution in vital drinking water sources.
This pioneering evidence calls for a coordinated approach integrating polymer-specific particle identification, detailed hydrogeological mapping, meteorological data, and exposure-based health risk evaluation in future studies. The findings underscore the urgent need to reexamine industrial water safety protocols, particularly in regions where communities rely extensively on borehole wells for their domestic water supply.
Subject of Research: Groundwater microplastic contamination linked to cement production
Article Title: Cement production as a source of groundwater microplastic pollution: occurrence, characteristics, and health risks in Sokoto, Nigeria
News Publication Date: 29-Apr-2026
Web References: 10.48130/newcontam-0026-0011
References: Yahaya TO, Abdulrahaman FO, Adewale MK, Kolawole OA, Izuafa A, et al. 2026. New Contaminants 2: e014
Keywords
microplastics, groundwater contamination, cement production, polymer analysis, environmental pollution, water quality, industrial impact
