Dane publiczne — hydrological observations
The current state of the Polish national gauging network: water level, discharge, water temperature and ice phenomena at 913 stations, each carrying the watercourse it gauges, its province, its founding year and the state’s own warning and alarm thresholds.
Rights
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- YesContains data from the Institute of Meteorology and Water Management — National Research Institute (IMGW-PIB).
- Terms last checked
- 27 August 2026
Access and coverage
- Publisher
- Instytut Meteorologii i Gospodarki Wodnej — Państwowy Instytut Badawczy
- Geographic coverage
- Poland — 913 hydrological stations
- Resolution
- Latest reading per station; Hydrionis accumulates a daily record
- Update frequency
- real-time
- Formats
- json, api
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- river flow, temperature, snow ice
Notes
Two things made Poland the strongest of the four European jurisdictions assessed. Every station names the watercourse it gauges, so Polish gauges join the water graph as they are collected, in the way Sweden’s and Finland’s do. And it carries ice phenomena, a hydrological state Hydrionis holds nowhere else and the one that decides what a Polish winter water level means. The interface serves the latest reading per station and nothing older, so this runs in accumulate mode and Hydrionis becomes the archive of a snapshot the API does not keep — IMGW holds the real archive and releases it on request, which is a route worth taking rather than scraping. Each quantity carries its own measurement timestamp: level, discharge and temperature are read at different times and frequently on different days, and one station in the first sample carried a February discharge beside a same-morning level. Readings older than a fortnight are refused, because a rolling snapshot repeats a stale value indefinitely and storing it on every run would fill the record with one ancient point per station.
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
- Mean river flow · m³/s
- River level · m
- Water temperature · °C
How current it is
- Partial record held
- IMGW-PIB 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. IMGW serves the latest reading per station through this interface and nothing older. Its archive exists and is released on request rather than through the API, so Hydrionis accumulates from the date collection began instead of scraping. The Polish record here deepens with each run rather than reaching backwards.IMGW serves the latest reading per station through this interface and nothing older. Its archive exists and is released on request rather than through the API, so Hydrionis accumulates from the date collection began instead of scraping. The Polish record here deepens with each run 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.