Utility functions to retrieve data from the UK National River Flow Archive (< https://nrfa.ceh.ac.uk/>, terms and conditions: < https://nrfa.ceh.ac.uk/help/costs-terms-and-conditions>). The package contains R wrappers to the UK NRFA data temporary-API. There are functions to retrieve stations falling in a bounding box, to generate a map and extracting time series and general information. The package is fully described in Vitolo et al (2016) "rnrfa: An R package to Retrieve, Filter and Visualize Data from the UK National River Flow Archive" < https://journal.r-project.org/archive/2016/RJ-2016-036/RJ-2016-036.pdf>.