Ontojärvi river
The Ontojärvi is a European river flowing through Finland. As of 2026-10-09, the Ontojärvi was flowing at about 145 m³/s at the Ontojärvi, Katerma gauge.
- Canonical name
- Ontojärvi
- Countries
- Finland
- Maximum upstream drainage area
- 5,791 km²
- Mapped river length
- 27.5 km
- Gauging stations
- 1
- Latest measured discharge
- 145 m³/s (Ontojärvi, Katerma, 2026-10-09)
Gauging stations on the Ontojärvi
The following gauging station reports discharge for the Ontojärvi. Discharge is in cubic metres per second (m³/s).
| Station | Country | Discharge (m³/s) | Historical Comparison | Observed | Measurement | Data quality | Provider | Lat, Lon | Source |
|---|---|---|---|---|---|---|---|---|---|
| Ontojärvi, Katerma | Finland | 145 | Much above normal303% above the historic median | daily mean | SYKE flag not supplied | Finnish Environment Institute | 64.096, 28.978 | source |
Related rivers
- Vuoksi
- Ossauskoski
- Valajaskoski
- Karunki
- Kemijoki
- Pirttikoski
- Seitakorva
- Piirteenvirta
- Merikoski
- Konnivesi
- Kokemenjoki
- Kolsi
Data, sources & timestamps
Geometry is the HydroRIVERS network (HydroSHEDS): European reaches with at least 500 km² of upstream catchment, merged into chains between confluences. Flow direction comes from the network itself; river names are the canonical English label joined from provider metadata and Natural Earth, with local-language aliases retained.
Discharge is normalised observed streamflow from official national hydrology providers, measured where a gauge sits on the river and interpolated between gauges. Pale/estimated values are derived from drainage area × the local specific discharge of nearby gauges and are never presented as measurements.