CC BY-NC 4.0Beckett, MarcMarcBeckettMohr, MariusMariusMohrWinker, MartinaMartinaWinkerRohrbach, MichaelaMichaelaRohrbachSchwarzer, AntjeAntjeSchwarzerGebhardt, TimTimGebhardtDockhorn, ThomasThomasDockhorn2025-10-232025-10-232025https://publica.fraunhofer.de/handle/publica/497693https://doi.org/10.24406/publica-585710.2166/wrd.2025.03210.24406/publica-58572-s2.0-105018203124The article focuses on the development of a risk management plan for small-scale water reuse system in Weißenberge, Germany. The reuse system comprises of wastewater treatment ponds, cloth filter, activated carbon biofilter, sandfilter, UV disinfection and a hydroponic tomato cultivation. Multi-stakeholder consultations, pre-validation and preliminary monitoring led to a low-risk perception during the risk assessment. Technical and non-technical barriers before and after the point of compliance resulted in a high level of safety confirmed during the operation. Remaining challenges in implementing EU regulation 2020/741, such as validation monitoring are discussed. Experiences made during the operation of the water reuse system as well as a review of scientific publications indicate that hydroponic cultivation does not have any increased risk compared against other cultivation methods.entrueagricultural water reuseHypoWavereclaimed waterrisk assessmentjournal article