# Sio river

The Sio is a European river flowing through Hungary. As of 2026-10-16, the Sio was flowing at about 3.879 m³/s at the Simontornya gauge.

**Canonical name:** Sio

**Countries:** Hungary

**Maximum upstream drainage area:** 14,890 km²

**Mapped river length:** 88.7 km

**Gauging stations:** 1

**Latest measured discharge:** 3.879 m³/s (Simontornya, 2026-10-16)

## Gauging stations on the Sio

The following gauging station reports discharge for the Sio. Discharge is in cubic metres per second (m³/s).

| Station | Country | Discharge (m³/s) | Historical Comparison | Observed | Measurement | Data quality | Provider | Lat, Lon | Source |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Simontornya | Hungary | 3.879 | Much below normal — 46% below the historic median | 2026-10-16 | instantaneous | operational open-data observation | Hungarian General Directorate of Water Management | 46.751, 18.54 | [source](https://data.vizugy.hu/) |

## Related rivers

-   [Tisza](/rivers/tisza.html)
-   [Mureș](/rivers/mures.html)
-   [Jászsági-főcsatorna](/rivers/jaszsagi-focsatorna.html)
-   [Maros](/rivers/maros.html)
-   [Nagykunsági-főcsatorna](/rivers/nagykunsagi-focsatorna.html)
-   [Hármas-Körös](/rivers/harmas-koros.html)
-   [Szamos](/rivers/szamos.html)
-   [Sajó](/rivers/sajo.html)
-   [Sebes-Körös](/rivers/sebes-koros.html)
-   [Rába](/rivers/raba-743.html)
-   [Kettős-Körös](/rivers/kettos-koros.html)
-   [Zala](/rivers/zala.html)

## 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.

Underlying dataset built 2026-10-16T13:31:53.036165+00:00. This page generated 2026-10-16T13:35:10.972Z. Discharge values carry their own observation dates in the table above.

[Explore the Sio on the interactive map →](/)