The monitoring network within this area

Hydrionis holds 1,085,840 values from 66 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

Gauges

1,085,840

Values held

1863–2026

Record spans

Gauges within the Kokemäenjoki drainage basin

66 monitoring points, positioned as the publisher records them.

How low, how high and how variable this gauge runs

A hydrograph says what happened; these say how often. Read off Muroleenkoski's whole daily record between 1863 and 2026, they describe the shape of the record rather than any day in it — and they belong to this gauge and its reach, not to this drainage area.

15.000 m³/s

Q95 low flow

46.000 m³/s

Q50 median flow

98.000 m³/s

Q10 high flow

Largest day of each water year at Muroleenkoski

The highest daily mean discharge in each October-to-September water year, 1863–2025.

These are the largest daily means, not flood peaks. A peak lasting hours is averaged across a whole day here, so the true instantaneous maximum on the same day was higher — sometimes far higher on a fast-responding catchment. Flood frequency work needs a publisher's own instantaneous series; Hydrionis holds one for 2,236 American gauges and not for this one, so the two are never drawn together. A water year the gauge did not substantially cover produces no value at all rather than a low one.

View the data behind this chart

Underlying data
Period	Muroleenkoski (m³/s)
1863	89.0
1864	91.0
1865	119
1866	204
1867	213
1868	127
1869	107
1870	85.0
1871	160
1872	101
1873	89.0
1874	78.0
1875	143
1876	152
1877	119
1878	152
1879	71.0
1880	119
1881	152
1882	93.0
1883	107
1884	119
1885	97.0
1886	65.0
1887	155
1888	114
1889	85.0
1890	95.0
1891	157
1892	93.0
1893	103
1894	50.0
1895	80.0
1896	155
1897	209
1898	269
1899	108
1900	95.0
1901	140
1902	135
1903	152
1904	157
1905	171
1906	150
1907	71.0
1908	85.0
1909	145
1910	115
1911	134
1912	134
1913	78.0
1914	72.0
1915	158
1916	65.0
1917	92.0
1918	131
1919	183
1920	95.0
1921	181
1922	131
1923	166
1924	66.0
1925	139
1926	167
1927	139
1928	92.0
1929	120
1930	102
1931	135
1932	82.0
1933	91.0
1934	143
1935	162
1936	98.0
1937	131
1938	82.0
1939	47.0
1940	31.0
1941	29.0
1942	154
1943	149
1944	145
1945	87.0
1946	63.0
1947	80.0
1948	103
1949	97.0
1950	145
1951	99.0
1952	152
1953	94.0
1954	152
1955	135
1956	143
1957	130
1958	101
1959	84.0
1960	118
1961	132
1962	84.0
1963	76.0
1964	93.0
1965	134
1966	146
1967	119
1968	105
1969	98.0
1970	104
1971	118
1972	68.0
1973	114
1974	150
1975	55.0
1976	172
1977	84.0
1978	91.0
1979	95.0
1980	150
1981	154
1982	95.0
1983	168
1984	95.0
1985	115
1986	142
1987	231
1988	160
1989	146
1990	83.0
1991	132
1992	112
1993	114
1994	147
1995	97.0
1996	95.0
1997	115
1998	98.0
1999	136
2000	140
2001	120
2002	91.0
2003	70.0
2004	74.0
2005	92.0
2006	95.0
2007	120
2008	132
2009	79.0
2010	79.0
2011	136
2012	111
2013	80.0
2014	112
2015	111
2016	53.0
2017	137
2018	71.2
2019	127
2020	119
2021	128
2022	110
2023	145
2024	80.1
2025	74.0

The longest record here

Mean river flow at Muroleenkoski

Annual means of the daily record, 1863–2025. One gauge, not this drainage area.

Annual means computed by Hydrionis from the published daily record, drawn only for years with at least 300 days held. They summarise this gauge's own record and say nothing about any other watercourse in this area.

View the data behind this chart

Underlying data
Period	Muroleenkoski (m³/s)
1863	58.3
1864	57.5
1865	37.0
1866	63.0
1867	59.0
1868	55.3
1869	56.9
1870	49.9
1871	41.2
1872	58.0
1873	62.9
1874	48.1
1875	30.0
1876	40.5
1877	60.0
1878	73.3
1879	56.1
1880	22.9
1881	47.2
1882	51.5
1883	50.0
1884	42.3
1885	43.0
1886	37.9
1887	31.0
1888	42.6
1889	46.6
1890	47.3
1891	33.3
1892	61.1
1893	52.0
1894	50.2
1895	35.3
1896	34.7
1897	48.8
1898	81.9
1899	91.8
1900	49.6
1901	39.7
1902	78.4
1903	61.3
1904	65.4
1905	61.2
1906	52.6
1907	67.2
1908	28.5
1909	34.1
1910	50.5
1911	47.2
1912	69.4
1913	49.6
1914	31.0
1915	41.1
1916	58.0
1917	41.2
1918	49.0
1919	55.9
1920	55.9
1921	35.4
1922	67.1
1923	76.1
1924	74.0
1925	39.1
1926	40.6
1927	71.6
1928	63.2
1929	58.9
1930	58.5
1931	54.8
1932	64.1
1933	36.0
1934	65.2
1935	73.9
1936	60.7
1937	44.6
1938	54.9
1939	36.6
1940	22.2
1941	16.8
1942	22.5
1943	70.6
1944	76.7
1945	65.6
1946	43.0
1947	31.9
1948	36.3
1949	48.1
1950	42.7
1951	48.9
1952	50.2
1953	70.4
1954	51.6
1955	63.6
1956	53.7
1957	68.1
1958	52.4
1959	37.6
1960	39.4
1961	69.0
1962	65.1
1963	50.0
1964	35.4
1965	50.5
1966	59.1
1967	71.4
1968	51.3
1969	41.6
1970	41.4
1971	49.3
1972	52.7
1973	39.7
1974	81.1
1975	59.7
1976	28.3
1977	65.9
1978	44.0
1979	58.0
1980	45.7
1981	94.8
1982	65.0
1983	54.1
1984	68.6
1985	50.4
1986	65.2
1987	76.4
1988	93.4
1989	63.9
1990	61.4
1991	61.3
1992	72.4
1993	56.0
1994	49.7
1995	57.0
1996	44.8
1997	49.9
1998	67.8
1999	46.2
2000	57.9
2001	70.0
2002	46.8
2003	33.2
2004	47.8
2005	53.8
2006	41.5
2007	51.5
2008	83.0
2009	40.9
2010	40.5
2011	56.0
2012	84.4
2013	44.6
2014	37.9
2015	54.5
2016	54.4
2017	42.6
2018	48.6
2019	34.3
2020	57.3
2021	54.1
2022	49.1
2023	72.1
2024	56.0
2025	43.8

Every gauge Hydrionis holds within this area

Gauges within the Kokemäenjoki and what each holds
Gauge	Measures	Values	Record
Muroleenkoski	mean river flow	59,808	1863–2026
Vanajavesi - Kuokkalankoski	mean river flow	42,277	1911–2026
Kitusjärvi - luusua	mean river flow	42,275	1911–2026
Sääksjärvi - luusua	mean river flow	38,577	1921–2026
Harjavalta	mean river flow	34,968	1931–2026
Tammerkoski	mean river flow	34,230	1933–2026
Leppäsjärvi - luusua	mean river flow	34,098	1933–2026
Kolsi	mean river flow	29,047	1947–2026
Pihlajavesi - luusua	mean river flow	27,667	1911–1986
Hartolankoski	mean river flow	27,298	1952–2026
Nokia	mean river flow	26,928	1953–2026
Toisvesi - Herraskoski	mean river flow	26,298	1904–1979
Valkeakoski	mean river flow	25,584	1956–2026
Sinerväjärvi - luusua	mean river flow	25,202	1931–1999
Äetsä	mean river flow	25,082	1957–2026
Vilppulankoski	mean river flow	23,963	1961–2026
Lempäälä+Kuokkalankoski	mean river flow	23,552	1962–2026
Liesjärvi, luusua	mean river flow	23,284	1963–2026
Käenkoski	mean river flow	21,822	1967–2026
Kukkia, luusua	mean river flow	21,068	1911–2026
Teuronjoki, Jokelankoski	mean river flow	20,230	1971–2026
Kiikka	mean river flow	20,211	1902–1957
Loimijoki, Maurialankoski	mean river flow	19,724	1931–1984
Haarajoki	mean river flow	19,300	1972–2026
Mustajoki	mean river flow	19,205	1971–2026
Kuhalankoski	mean river flow	19,113	1966–2018
Puujoki, Varunteenkoski	mean river flow	17,635	1978–2026
Linnanjärvi - luusua	mean river flow	17,167	1911–1957
Kyröskoski	mean river flow	16,708	1981–2026
Killinkoski	mean river flow	16,588	1981–2026
Mätikkö - luusua	mean river flow	16,071	1911–1954
Äväntäjärvi - luusua	mean river flow	15,548	1984–2026
Loimijoki, Maurialankoski	mean river flow	15,248	1985–2026
Vesijako, Palsankoski	mean river flow	15,234	1985–2026
Vammaskoski	mean river flow	14,610	1911–1950
Kuusjärvi - luusua	mean river flow	14,575	1986–2026
Loimijoki, Sallilankoski	mean river flow	12,935	1989–2026
Parkanonjoki	mean river flow	12,749	1931–1971
Haapajärvi - luusua	mean river flow	12,382	1911–2026
Hankavesi - Inha	mean river flow	11,707	1983–2026
Pitkävesi - luusua	mean river flow	9,862	1911–1937
Kyröskoski	mean river flow	9,862	1907–1933
Siuro, ylä	mean river flow	9,513	1997–2026
Kahilanjärvi - luusua	mean river flow	9,390	1956–1981
Loimijoki, Vesikoski	mean river flow	9,192	1910–1935
Ouluvesi - luusua	mean river flow	9,131	1911–1935
Jämijärvi - luusua	mean river flow	8,766	1931–1954
Harjunpäänjoki	mean river flow	8,001	1970–1991
Äetsä	mean river flow	5,844	1940–1955
Salkolanjärvi - luusua	mean river flow	5,844	1975–1990
Puujoki, Leppäkoski	mean river flow	5,834	1911–1937
Tarpianjoki	mean river flow	5,480	1911–1932
Tampere, Alakoski	mean river flow	5,357	1970–1984
Nokia	mean river flow	5,114	1939–1952
Ryötönkoski, kokonaisvirtaama	mean river flow	4,938	2013–2026
Vääräkoski, kokonaisvirtaama	mean river flow	4,938	2013–2026
Hyvikkälänjoki	mean river flow	4,807	1978–1991
Forssa, Loimijoki Q	mean river flow	4,025	2015–2026
Juupajoki	mean river flow	3,653	1911–1920
Niemisvesi - luusua	mean river flow	3,653	1911–1920
Nerkoonjärvi - luusua	mean river flow	3,173	1931–1939
Äetsä	mean river flow	2,922	1949–1956
Loppijärvi - Luusua	mean river flow	2,435	2009–2016
Vanajavesi - Lempäälän kanava	mean river flow	1,734	2022–2026
Porraskoski	mean river flow	1,247	1984–1987
Matalusjoki	mean river flow	1,157	2022–2025

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 35. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
Muroleenkoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Vanajavesi - Kuokkalankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kitusjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Sääksjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Harjavalta	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Tammerkoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Leppäsjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kolsi	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Pihlajavesi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Hartolankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Nokia	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Toisvesi - Herraskoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Valkeakoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Sinerväjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Äetsä	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Vilppulankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Lempäälä+Kuokkalankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Liesjärvi, luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Käenkoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kukkia, luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Teuronjoki, Jokelankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kiikka	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Loimijoki, Maurialankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Haarajoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Mustajoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kuhalankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Puujoki, Varunteenkoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Linnanjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kyröskoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Killinkoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Mätikkö - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Äväntäjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Loimijoki, Maurialankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Vesijako, Palsankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Vammaskoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kuusjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Loimijoki, Sallilankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Parkanonjoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Haapajärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Hankavesi - Inha	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Pitkävesi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kyröskoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Siuro, ylä	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kahilanjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Loimijoki, Vesikoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Ouluvesi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Jämijärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Harjunpäänjoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Äetsä	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Salkolanjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Puujoki, Leppäkoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Tarpianjoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Tampere, Alakoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Nokia	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Ryötönkoski, kokonaisvirtaama	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Vääräkoski, kokonaisvirtaama	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Hyvikkälänjoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Forssa, Loimijoki Q	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Juupajoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Niemisvesi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Nerkoonjärvi - luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Äetsä	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Loppijärvi - Luusua	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Vanajavesi - Lempäälän kanava	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Porraskoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Matalusjoki	Stated by the publisher on the record this gauge’s observations came from.	With the observations

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 3 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	66	yes, 3 or more
Years spanned	164	yes, 20 or more
Values held	1,085,840	yes, 1000 or more
Distinct measurements	1	no
Publishers measuring it	1	no
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/fi-syke-3506200.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Attribution you are required to give

These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.

Contains data from the Finnish Environment Institute (Syke), licensed under CC BY 4.0.

Suomen ympäristökeskus (Finnish Environment Institute) — CC BY 4.0 (licence text)

Suggested citation for Hydrionis

Hydrionis (2026), Kokemäenjoki gauge records, accessed 2026-10-05, hydrionis.com/waters/finland-kokemaenjoki/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Kokemäenjoki gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

Where these figures come from

MeasuredHigh confidence2026-09-30

Source: Syke — Hydrologiarajapinta — Finnish national hydrological archive, 3506200. Licence: Open — attribution required (attribution required).

Method: Daily discharge exactly as the Finnish Environment Institute publishes it. Syke computes the daily value from its own measurement and rating curves; Hydrionis does not recompute it, because a mean derived from whatever sub-daily data happens to be exposed would be a different statistic under the same name. Values Syke flags as possibly erroneous are not stored.

65 of these values (under 1%) are interpolated by Syke rather than measured, and are marked as such in its own archive. Station in the Kokemäenjoki main drainage basin, Paloveden la sub-basin. Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 1 October 2026.