# San river

The San is a European river flowing through Poland. As of 2026-10-16, the San was flowing at about 1.21 m³/s at the Zatwarnica gauge.

**Canonical name:** San

**Countries:** Poland

**Maximum upstream drainage area:** 3,675 km²

**Mapped river length:** 178.3 km

**Gauging stations:** 6

**Latest measured discharge:** 1.21 m³/s (Zatwarnica, 2026-10-16)

## Gauging stations on the San

The following 6 gauging stations report discharge for the San, ordered downstream (largest catchment first). Discharge is in cubic metres per second (m³/s).

| Station | Country | Discharge (m³/s) | Historical Comparison | Observed | Measurement | Data quality | Provider | Lat, Lon | Source |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Zatwarnica | Poland | 1.21 | Much below normal — 93% below the historic median | 2026-10-16 | instantaneous | operational value | IMGW-PIB | 49.235, 22.563 | [source](https://danepubliczne.imgw.pl/api/data/hydro) |
| Hoczew | Poland | 0.11 | Much below normal — 98% below the historic median | 2026-10-16 | instantaneous | operational value | IMGW-PIB | 49.424, 22.328 | [source](https://danepubliczne.imgw.pl/api/data/hydro) |
| Lesko | Poland | 8.12 | Much below normal — 69% below the historic median | 2026-10-16 | instantaneous | operational value | IMGW-PIB | 49.469, 22.322 | [source](https://danepubliczne.imgw.pl/api/data/hydro) |
| Zagórz | Poland | 0.31 | Much below normal — 98% below the historic median | 2026-10-16 | instantaneous | operational value | IMGW-PIB | 49.513, 22.269 | [source](https://danepubliczne.imgw.pl/api/data/hydro) |
| Olchowce | Poland | 8.32 | Much below normal — 76% below the historic median | 2026-10-16 | instantaneous | operational value | IMGW-PIB | 49.556, 22.219 | [source](https://danepubliczne.imgw.pl/api/data/hydro) |
| Dynów | Poland | 9.25 | Much below normal — 79% below the historic median | 2026-10-16 | instantaneous | operational value | IMGW-PIB | 49.801, 22.244 | [source](https://danepubliczne.imgw.pl/api/data/hydro) |

## Related rivers

-   [Vistula](/rivers/vistula.html)
-   [Oder](/rivers/oder.html)
-   [Bug](/rivers/bug.html)
-   [Warta](/rivers/warta.html)
-   [Narew](/rivers/narew.html)
-   [Noteć](/rivers/notec.html)
-   [San](/rivers/san.html)
-   [Bug](/rivers/bug-129.html)
-   [Wieprz](/rivers/wieprz.html)
-   [Pilica](/rivers/pilica.html)
-   [Bug](/rivers/bug-130.html)
-   [Bzura](/rivers/bzura.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 San on the interactive map →](/)