Objectives This paper focuses on the normative solutions established under the Polish Rural Development Programme (RDP) 2014–2020 for the support of water-law companies involved in the protection of agricultural production against the consequences of adverse weather conditions such as flooding, partial flooding or torrential rain. Material and methods The paper aims to determine to what extent, if any, the aid ensures the continued operation of an agricultural producer (farm sustainability). In terms of methodology, the research relies chiefly on a dogmatic analysis of legal texts. Legal considerations are supplemented with statistical data under access to public information regulations. Results The study of the research material has revealed that water-law companies are more inclined to invest in the protection of the producer’s workplace when presented with favourable financial terms and clear legal regulations.With regard to operations performed by water-law companies to protect agricultural production against the effects of adverse weather conditions such as flooding, partial flooding, or excessive dampness caused by flooding or torrential rain, this aid has a narrow thematic scope and addresses the need for public intervention due to drainage and irrigation hazards. Conclusions It may be assumed that the analysed form of ex-ante support dedicated to water-law companies – “Support for investments in preventive measures for the mitigation of damage caused by probable natural disasters, adverse climatic phenomena, and catastrophic events” – ensures farm sustainability with respect to the explicitly identified risks.