**Archived extract:** 2026-10-09 (UTC). Frozen data; observation dates are shown as captured. [View the current site](/) # Piirteenvirta river The Piirteenvirta is a European river flowing through Finland. As of 2026-10-07, the Piirteenvirta was flowing at about 136.3 m³/s at the Voikkaa gauge. **Canonical name:** Piirteenvirta **Countries:** Finland **Maximum upstream drainage area:** 26,795 km² **Mapped river length:** 71.6 km **Gauging stations:** 13 **Classification:** Major European river **Latest measured discharge:** 136.3 m³/s (Voikkaa, 2026-10-07) ## Gauging stations on the Piirteenvirta The following 13 gauging stations report discharge for the Piirteenvirta, 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 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Voikkaa | Finland | 136.3 | Much below normal — 27% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.938, 26.601 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Kuusankoski | Finland | 141.3 | Much below normal — 29% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.907, 26.652 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Keltti | Finland | 145.7 | Much below normal — 21% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.874, 26.617 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Myllykoski | Finland | 145 | Much below normal — 23% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.767, 26.775 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Anjala | Finland | 143.2 | Much below normal — 22% below the historic median | 2026-10-08 | daily mean | SYKE flag 108 | Finnish Environment Institute | 60.698, 26.821 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Piirteenvirta | Finland | 153 | Much below normal — 24% below the historic median | 2026-10-08 | daily mean | SYKE flag 108 | Finnish Environment Institute | 60.668, 26.846 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Piirteenvirta | Finland | 148.9 | Much below normal — 22% below the historic median | 2026-10-08 | daily mean | SYKE flag 108 | Finnish Environment Institute | 60.641, 26.76 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Pernoonkoski | Finland | 54.53 | Much below normal — 34% below the historic median | 2026-10-08 | daily mean | SYKE flag 108 | Finnish Environment Institute | 60.58, 26.791 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Kymijoki, itähaara | Finland | 68.8 | Much below normal — 21% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.522, 26.867 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Koivukoski | Finland | 22.34 | Normal — 12% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.522, 26.867 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Pihkoo | Finland | 0.5 | Normal — at the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.52, 26.863 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Korkeakoski | Finland | 46.46 | Much below normal — 23% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.531, 26.911 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | | Sutela | Finland | 22.2 | Normal — 4% below the historic median | 2026-10-07 | daily mean | SYKE flag not supplied | Finnish Environment Institute | 60.509, 26.879 | [source](https://www.syke.fi/en/environmental-data/open-web-services/environmental-data-apis) | ## Related rivers - [Vuoksi](/archive/2026-10-09/rivers/vuoksi.html) - [Ossauskoski](/archive/2026-10-09/rivers/ossauskoski.html) - [Valajaskoski](/archive/2026-10-09/rivers/valajaskoski.html) - [Karunki](/archive/2026-10-09/rivers/karunki.html) - [Kemijoki](/archive/2026-10-09/rivers/kemijoki.html) - [Pirttikoski](/archive/2026-10-09/rivers/pirttikoski.html) - [Seitakorva](/archive/2026-10-09/rivers/seitakorva.html) - [Merikoski](/archive/2026-10-09/rivers/merikoski.html) - [Konnivesi](/archive/2026-10-09/rivers/konnivesi.html) - [Kokemenjoki](/archive/2026-10-09/rivers/kokemenjoki.html) - [Kolsi](/archive/2026-10-09/rivers/kolsi.html) - [Pälli](/archive/2026-10-09/rivers/palli.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 2026-10-09T12:15:16.537822+00:00. This page generated 2026-10-09T12:20:30.802Z. Discharge values carry their own observation dates in the table above. [Explore the Piirteenvirta on the interactive map →](/archive/2026-10-09/)