Hydrological observations

Automated quantitative and qualitative water measurements from the national hydrological monitoring network operated by the FOEN. The data product exposes station metadata, aggregated observation time series (10-minute, hourly, daily, monthly and yearly) and a near-real-time live feed (5–10 minute cadence, 7-day rolling window).

Result order and pagination

Results are returned in no particular order and a single query is capped at 10 000 rows. Queries that exceed the cap are rejected rather than truncated. Larger datasets are retrieved by partitioning into smaller filter windows (typically a date range) and iterating. See Pagination for details.

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Available fields

Field	Type	Notes
no	String	Station number.
name	String	Station name.
siteName	String	Site name.
riverName	String	River or water body name.
catchmentName	String	Catchment area name.
localX	Float	X coordinate (Swiss LV95).
localY	Float	Y coordinate (Swiss LV95).
latitude	Float	Latitude (WGS84).
longitude	Float	Longitude (WGS84).
status	String	Operational status. Values: Aufgebaut (in operation), Aufgehoben (decommissioned).
elevation	Float	Elevation in metres above sea level.
adminName	String	Administrative area name.
adminLevel	String	Administrative level.
coverageFrom	AWSDateTime	Earliest date for which data is available.
coverageTo	AWSDateTime	Latest date for which data is available.

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Available fields

Field	Type	Notes
parameterName	String	Parameter code. Common values: Q (discharge), W (water level), WT (water temperature).
tsName	String	Time-series name.
unitName	String	Unit, full name.
unitSymbol	String	Unit symbol, e.g. m³/s, °C, m ü.M.
timestamp	AWSDateTime	Aggregation interval start (ISO-8601 UTC).
value	Float	Aggregated measurement value.
releaseState	String	Release / validation state. Values: 1 (provisional), 2 (validated), 3 (final / replaced).
station	Water_Observations_Station	Nested station metadata: name, no, latitude, longitude, id.

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Available fields

Field	Type	Notes
stationNo	String	Station number (BAFU 4-digit code, range 2000–2999).
parameterName	String	Normalised parameter code: W (water level), Q (discharge), WT (water temperature).
timestamp	AWSDateTime	Observation timestamp (ISO-8601 UTC).
value	Float	Measured value in the parameter's native unit.
releaseStatus	Int	Release status flag; always 0 for the live (uncorrected) feed.

Download data

The full time series are available as prepared, monthly-grouped files (.csv.gz) for direct download — organised by year and aggregation level. For targeted, filtered extracts, use the GraphQL API.

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Notes

• Filter operators follow the Hasura convention: _eq, _neq, _in, _gte, _lt, _between, etc.
• Timestamps are ISO-8601 in UTC (YYYY-MM-DDTHH:MM:SSZ).
• Available aggregations: data_10min_mean, data_1hour_mean, data_1day_mean, data_1day_min, data_1day_max, data_1month_mean, data_1year_mean, and data_live.
• For long time series the request is split into timestamp windows that each stay under 10 000 rows. See the note above.
• The data_live feed has different characteristics from the aggregated feeds: rows older than 12 hours are not exposed, observations appear in the API approximately 9–19 minutes after the sensor reading, and the row shape omits the nested station object.

Contact

Questions about the content of this dataset can be addressed to the FOEN — see Contact.