The National Soil Monitoring Network NABO began very early with the assessment of organic pollutants. So far, the focus has been on polycyclic aromatic hydrocarbons (PAH) and polychlorinated biphenyls (PCB). Between 1995 and 1999, these pollutants were assessed in a status survey at all NABO sites; additionally, the evolution over time from 1985 to 2014 was investigated recently (Figure). The organic pollutants include an enormous number of compounds, which are used agriculturally in plant protection products (PPP) as well as in industrial and household products.
Today, plant protection products (PPP) are included in the NABO priorities; at selected sites, a first screening was conducted in 2010. Based on a parallel assessment of management data at roughly 50 agricultural NABO sites, the applied PPP can be specified and the expected concentrations in the soil can be estimated. First results will be published soon. Furthermore, due to the experience with this recent work, the analyses can be optimised. Beginning in 2017, the method should be applicable at all of the relevant NABO sites.