Pöyrysjärvi is a lake surrounded by the open bog on the border are of the town of Orimattila and municipality of Myrskylä. It is classed as a precious natural reserve in Päijänne Tavastia county. Apart from that the city of Orimattila classifies it as an important object for teaching of marsh types and its fauna.[1]

This article includes a list of general references, but it lacks sufficient corresponding inline citations. (October 2021)

Pöyrysjärvi
Panorama view from the northern beach
Pöyrysjärvi
Location	southeastern Finland
Coordinates	60°42′53.70″N 25°50′6.90″E
Primary outflows	Koskenkylänjoki
Basin countries	Finland
Surface area	0.02 km2 (0.0077 sq mi)
Average depth	3 m (9.8 ft)
Max. depth	4 m (13 ft)
Surface elevation	61.3 m (201 ft)
Settlements	Myrskylä, Orimattila

The other lakes connected to the Myrskylänjoki watershed are Isojärvi, Vähäjärvi, Muttilanjärvi, Siippo, Sopajärvi, Kirkkojärvi and Sulkavanjärvi.

Environmental issues

The town of Orimattila measures every fifth or sixth year some parametres related to the water. 10 July 2006 the results were:

• solids: 0,029 g/L
• oxygen-%: 24.0 (on the surface) / 8.87 mL/L (on the surface), 11.3% (on the bottom) / 1.1 mL/L (on the bottom)
• Redox pot. (Mv): 307.0
• pH: 4.2
• total phosphor: 15 μg/L
• total nitrogen: 380 μg/L
• total chlorophyll: 15 μg/L

References

Sources

• Jarviwiki

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