Microplastics and its environmental impacts is a research area under development. Sampling and analysis methods are complicated by the fact that microplastics may come from different raw materials, which means that its content, particle size and density may vary. It is clear that microplastics is a problem in marine environments as intake and accumulation of micro- and macroplastics have been recorded in invertebrates, fish, mammals and birds. The microplastics may affect, among other things, the digestion and reproduction of aquatic animals. The microplastics have also been recorded in foods that are relevant to humans, but what effects microplastics have on humans is still unclear. In a report from 2017, the Swedish Environmental Research Institute (IVL) estimated artificial turf fields to be the second largest quantified source for spreading the microplastics to the environment with 1638 - 2456 tons per year, after wear of tire and roads. Football is one of Sweden's most popular sports and the number of artificial turf fields in the country in 2016 reached 1336. Due to the fact that artificial turf fields is considered an important reason for the spreading of microplastics, it becomes important to investigate the reasons why and how microplastics are spread from artificial turf fields and also what measures can be taken to reduce the spread. The purpose of this study is to identify the reasons why microplastics are spread, as well as to present measures that can reduce the overall spread of microplastics from artificial turf fields. The methodology is based on previous studies of microplastics in aquatic environments and water samples were collected from drainage wells that belonged to two artificial turf fields and from a “water-infiltration-sampler” from a third field. In addition, field studies with observations have been carried out at two other artificial turf fields, and conversations with maintenance personal have provided additional relevant information on how microplastics can be spread. The results show that microplastics are spread from artificial turf fields and the identified reasons for this spreading, without specific order of magnitude, are mainly 1. Activity on the field 2. Brushing of the fields 3. Snow plowing of the fields 4. Rain (which means infiltration through the field as well as surface runoff) These causes, as well as possible pathways for the spreading of microplastics from an artificial turf field to the surroundings, have been visualized in a conceptual model, Figure 11. The model has two system boundaries; the inner system consists of the field itself, while the outer system is the direct area around the field and can be equated with the sports facility. It is only microplastics that are spread from the outer system to the environment which is considered to cause ecological consequences. Ocular microscopy studies of water samples from drainage wells showed presence of microplastics. Quantification of the amount of solids that can reach the drainage wells, where microplastics constitute an unknown proportion, amounted to a maximum of 340 – 370 kg per year and artificial turf field measuring 105m×65m. The maximum amount of microplastics that can infiltrate through an artificial turf field down to its drainage system was quantified to 0,003 kg per year and artificial turf of 105m×65m. This indicates that more open transport routes, such as open wells, could be needed to allow microplastics to reach drainage wells to a greater extent. The quantification of other causes for the spreading of microplastics from artificial turf fields to the environment area is uncertain, but careful estimations show that they are weighty comprehensive. To measure and secure the number of particles that are spread from artificial turf fields, more extensive sampling and analysis would have to be carried out.