Stormwater possibly represents a significant input for plastic debris in the environment; however, the quantification and composition of plastic debris and other macrolitter in stormwater are not available in literature and the amounts discharged into freshwater have been poorly investigated. To obtain a better understanding, the occurrence, abundance, and composition of the macrolitter in screened materials from stormwater were investigated at a small residential suburban catchment (Sucy-en-Brie, France) in Greater Paris. The macrolitter, particularly the plastic debris, was sorted, weighed, and classified based on the OSPAR methodology. On average, plastics accounted for at least 62% in number and for 53% of the mass of all the anthropogenic waste found in the screened materials. The most common items were plastic bags or films, crisp or sweet packets, cigarette butts, plastic fragments of unknown origin, garbage bags or garbage bag strings, foil wrappers, tampon applicators, plastic cups, and medical items such as bandages. Plastic debris concentrations in runoff water ranged between 7 and 134 mg/m³ (i.e. 0.4–1.7 kg.yr⁻¹.ha⁻¹ or 4.8–18.8 g.yr⁻¹.cap⁻¹). When extrapolated to the Greater Paris area, the estimated amount of plastic debris discarded into the environment through untreated stormwater of separate sewer systems ranges from 8 to 33 tons.yr⁻¹.

雨水可能是环境中塑料碎片的重要来源；然而，文献中没有对雨水中的塑料碎片和其他大分子物质进行定量和组成的研究，对淡水排放量的研究也很少。为了更好地理解，在大巴黎的一个郊区住宅集水区（法国苏西恩布里）调查了雨水中筛选出的物质中巨噬细胞的发生，含量和组成。根据OSPAR方法对大颗粒物，特别是塑料碎屑进行分类，称重和分类。平均而言，塑料占被筛查材料中发现的所有人为废物的数量至少占62％，占质量的53％。最常见的物品是塑料袋或薄膜，脆的或甜的小包，烟头，未知来源的塑料碎片，垃圾袋或垃圾袋绳，铝箔纸，棉塞敷料器，塑料杯以及绷带等医疗用品。径流水中的塑料碎片浓度范围为7至134 mg / m³（即0.4–1.7 kg.yr ^-1 .ha ^-1或4.8–18.8 g.yr ^-1 .cap ^-1）。当推断到大巴黎地区时，通过单独的下水道系统未经处理的雨水排入环境的塑料碎片的估计数量为8到33吨.yr ^-1。