This website contains real time water level data recorded at hydrometric gauging stations operated by the OPW. The OPW operate surface water gauging stations at over 350 locations nationwide and water level data from the majority of these are now available in real time.
This website disseminates near real time and quality assessed hydrometric data from the OPW National Hydrometric Archive. This includes data from both active and inactive OPW gauging stations. The data from gauging stations operated by the OPW is derived from continuous measurement of surface water levels. At the majority of the sites, discharge can also be estimated through application of a site specific rating curve (known as a stage discharge relationship) developed from a series of flow measurements taken on an ongoing basis.
Along with general station information, quality assessed water level and flow data is presented in various commonly used formats including:
The national hydrometric network is administered by the Environmental Protection Agency (EPA), which is required to prepare a national programme for the collection and publication of hydrometric information in the State. The OPW, Local Authorities, and the Electricity Supply Board (ESB) own, operate and maintain the vast majority of the existing inland hydrometric network in Ireland. The EPA provides assistance in collecting data from Local Authority gauges and in the quality assurance, archiving and dissemination of this data; it also maintains the Register of Hydrometric Stations in Ireland. EPA Hydrometric site