Swedish hydrological observations
The Swedish national hydrological record: river discharge at fifteen-minute, daily and monthly resolution, water level, water temperature, ice formation and break-up, and snow water content, across 720 gauging stations.
Rights
- Licence
- CC BY 4.0
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- YesData from Sveriges meteorologiska och hydrologiska institut, used under CC BY 4.0.
- Terms last checked
- 25 August 2026
Access and coverage
- Publisher
- Sveriges meteorologiska och hydrologiska institut
- Geographic coverage
- Sweden — 720 discharge stations, 299 currently active
- Temporal coverage
- 1851 onwards
- Resolution
- Discharge published by SMHI at fifteen-minute, daily and monthly resolution
- Update frequency
- daily
- Formats
- json, csv, api
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- river flow, temperature
Notes
The deepest open river record Hydrionis holds. It is unusual in two ways that matter: the record reaches back to 1851 — deeper than anything Hydrionis holds outside the English and Met Office series — and SMHI publishes discharge already aggregated to daily and monthly, so Hydrionis would store the publisher’s own aggregate rather than computing one from sub-hourly readings and having to defend the method. Ingested in Sprint 6, stored one partition per main drainage basin: the whole daily archive is roughly 200 MB, which in a single file would be eight times the largest partition held, and a basin is the unit a river profile actually asks for.
What Hydrionis uses it for
9,507,623 observations across 1 metrics currently reference this source.