Small stream monitoring - recommendations for risk regulation and monitoring of PPP
As part of the authorisation procedure for plant protection products (PPP), it must be ensured that the substances do not have an unacceptable impact on surface waters. To this end, in the EU and Switzerland the PPP concentrations that may occur in water bodies are predicted using mathematical models and compared with the threshold values (regulatory acceptable concentrations, RAK). These RAK values are also determined within the authorisation procedure on the basis of ecotoxicological data and safety factors. But are the predicted PPP concentrations actually correct? And does the combination of the expected concentrations and the threshold values provide sufficient protection for water bodies? What does this mean for risk management?
In order to find this out, the PPP contamination of small streams in agricultural areas is being recorded representatively within a monitoring campaign in Germany. Here, the first results from this campaign are assessed with regard to the legal requirements for water protection, overarching conclusions are drawn and recommendations for politics and regulation are developed. The aim is to find out the need for action for the authorisation procedure for PPP and monitoring. The project is funded by the German Environment Agency.