With proven effects on the environment and health, synthetic polymer microparticles usually called microplastics (MPs) can accumulate in the food chain, release toxic substances or serve as vectors for other contaminants and pathogens. Urban areas are major sources and pathways for the transfer of MPs to water bodies. Their transfer to the natural environment involves complex transport processes through runoff and stormwater management systems.

) Analyze and quantify the impact of source control systems for stormwater management on the different components of the water cycle at the scale of an urbanized catchment.

The Rhône-Mediterranean-Corsica Water Agency is lobbying to reduce impervious urban soils. Urban communities encourage the use and implementation of alternative stormwater control systems (PUCs: ponds, ponds, trenches, green roofs, porous roads, etc.) known to reduce water flow and thus saturate networks and discharges into receiving environments.