Pöyrysjärvi is a lake surrounded by the open bog on the border are of the town of

Orimattila Orimattila () is a town in Päijänne Tavastia regions of Finland, region, Finland. The southern part of Lahti is connected to the village of Orimattila, which is located in the region of Pennala. There are also several municipalities in the area, ...

and municipality of Myrskylä. It is classed as a precious natural reserve in Päijänne Tavastia county. Apart from that the city of

classifies it as an important object for teaching of marsh types and its fauna. 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 Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...

-%: 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 A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy. The term is used both for fluorescent or phosphorescent substances which glow on exposure to ultraviolet or vi ...

: 15 μg/L *total

nitrogen Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at se ...

: 380 μg/L *total

chlorophyll Chlorophyll (also chlorophyl) is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words , ("pale green") and , ("leaf"). Chlorophyll allow plants to a ...

: 15 μg/L

References

Sources

*Jarviwik

Lakes of Myrskylä {{SouthernFinland-geo-stub