Irish national hydrometric network
Water level and flow from the Irish national hydrometric network operated by the Office of Public Works, with the Environmental Protection Agency and local authorities: 2,007 station-sensor series across rivers and lakes, published as GeoJSON with a per-station CSV.
Rights
- Licence
- CC BY 4.0
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- YesContains Irish Public Sector Information licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence (source http://waterlevel.ie — provided by the Office of Public Works).
- Terms last checked
- 25 August 2026
Access and coverage
- Publisher
- Office of Public Works
- Website
- https://waterlevel.ie/
- Geographic coverage
- Republic of Ireland — 2,007 station-sensor series
- Temporal coverage
- 2026 onwards
- Resolution
- Sub-hourly measurement; five-week rolling window per station
- Update frequency
- real-time
- Formats
- geojson, csv, api
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- river flow
Notes
Collected under the accumulate update mode: 450 stations reporting water level against Ordnance Datum, stored as daily means. Every sensor’s parameter is confirmed against the publisher’s own station page before its values are read, because the interface identifies a series only by a code and the codes are not self-explanatory — sensor 0003 returns values around 12.9 that read perfectly as a water temperature and are the station’s battery voltage. The depth limit is unchanged. The CSV a station serves covers roughly the last five weeks; anything older is directed to the separate OPW Hydro-Data site, a Kisters application whose machine interface was not located and which was not scraped. So waterlevel.ie is a rolling-window publisher of the same kind as PEGELONLINE, and the accumulate update mode is exactly what it needs: Hydrionis would begin with about five weeks per station and deepen prospectively. The deeper archive is worth pursuing directly with the OPW, who publish a contact address for it. That archive’s machine interface was later located and refused: see ie-opw-hydrodata. It would have named the river for every Irish gauge, and it is behind a click-through agreement that grants no reuse licence, so Ireland’s gauges remain unlinked.
What Hydrionis holds from this publisher
The publisher’s own coverage is above. This is what Hydrionis has actually taken from it, at the subjects it measures — gauges, boreholes, reservoirs or places.
What is measured
- River level · m
How current it is
- Partial record held
- OPW waterlevel.ie offers more than Hydrionis currently holds. The newest value here covers 2026-10; the gap is a deliberate limit on what has been collected, not a limit on the source. The Office of Public Works serves about five weeks per station through this interface; its longer record sits on the separate Hydro-Data site, whose machine interface was not located and which Hydrionis does not scrape. The record here deepens with each collection rather than reaching backwards.The Office of Public Works serves about five weeks per station through this interface; its longer record sits on the separate Hydro-Data site, whose machine interface was not located and which Hydrionis does not scrape. The record here deepens with each collection rather than reaching backwards.
Hydrionis products built from it
Where this publisher’s data reaches a reader. Each has its own page, with its licence and how to cite it.