Stormwater pollution occurs when rainwater flows across industrial or construction sites and carries contaminants such as oil, chemicals, paint, cement residue, sediment, and waste into storm drains, rivers, and other water bodies. This pollution can damage aquatic ecosystems, reduce water quality, and create environmental hazards. Organizations should identify potential contamination sources and develop a stormwater management plan before starting site activities. Materials such as chemicals, fuels, and lubricants should be stored in designated covered areas with suitable containment measures. Waste containers should remain closed, and loading, unloading, vehicle maintenance, and equipment cleaning should take place in designated areas to prevent pollutants from mixing with rainwater.

Effective stormwater management also requires proper drainage systems, sediment barriers, and regular site inspections. Construction teams should control exposed soil, prevent cement slurry and untreated wastewater from entering storm drains, and clean up spills immediately using appropriate procedures. Industrial facilities should inspect drains, catch basins, and runoff-control equipment to ensure they remain clear and functional. Employees and contractors should receive training on pollution prevention and know how to report leaks, spills, and drainage problems. Organizations must also follow applicable environmental regulations and obtain required permissions for discharge where relevant. By combining preventive measures, responsible material storage, routine monitoring, and employee awareness, workplaces can reduce stormwater contamination and protect surrounding water resources.