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Pyhäjärvi is a lake in southern Finland. The name means "holy lake". Pyhäjärvi is shaped like the letter "C" with the cities of Tampere and Nokia on the northern end, and Hämeenlinna at the southern.

The lake is fed by the water running through the Tammerkoski rapids in the center of the city of Tampere. Because of the rapids, the water in Pyhäjärvi is warmer and richer in ozone than that in the northern lake Näsijärvi. As an effect, the life in this lake is richer, but the water is also more polluted.


The town of Pyhäjärvi is located in the southernmost corner of the province of Oulu in an area we call Oulu South. Pyhäjärvi bordering also on the provice of Eastern Finland and Western Finland. The town belongs to the subregion of Nivala-Haapajärvi

As the highway 4 (E75), the highway 27 and the Ylivieska-Iisalmi railway all run through the town, Pyhäjärvi is well situated in an intersection of communication and transport services. The town has also an airfield, equipped for instrument flying.

The town of Pyhäjärvi. Formerly the municipality of Pyhäjärvi, was founded in 1866, and it was then named after lake Pyhäjärvi, a lake of 125 square kilometers and rich in fish. Pyhäjärvi became officially a town January 1993.

The town has about 7.000 inhabitants, of whom some 60 percent live in the two population centre Pyhäsalmi and Ruotanen.