Real-time Flood Data River Levels

This record is for Approval for Access product AfA104 Real-time Flood Data River Levels via our API. This dataset covers monitoring data that is only updated on our systems during a routine daily update cycle, some sites will update more frequently as we update the field technology used over the next few years till 2025. During times of flooding, or other water level related incidents our update frequency can be increased if the technology at site allows. Readings are transferred via telemetry to internal and external systems in or close to real-time. This data is transferred to other systems, including the API. Data for sites in Wales is included in the Open Data feed, but is owned by Natural Resources Wales (NRW). NRW also class the data as Open Data, and you may use it under the same terms as the England data (the standard Open Government Licence, available on The National Archives website). Measurements of the height (m) of water in a river lake or coastal site are taken using automatic field instruments and typically log the value every 15 minutes. Information is available for 1400 river gauging stations (where flow is also measured) and 1800 river level only monitoring sites throughout England as well as some reservoirs and coastal sites.