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Surface waters resources are of the basic importance in supplies to the National Economy of our country. Water intake for needs of the economy amounts annually to about 12000 million m3, including 71.4 % consumed by the industry, 19,8% by the municipal services, 8.8 % agriculture and forestry. Almost the whole supplied water comes back to the surface waters in the form of the wastewaters. Those waters, except of the mountain streams, are therefore as a rule polluted with the domestic and municipal wastes and only about 13% of the waters in Poland are the waters in I class of purity.In this connection, the chemism of Niemica River waters was examined in four measuring points. The tests were performed there because of the fact, that that river supplies the Kamien Bay waters, and at the same time is the collector of the treated wastewaters from the sewage treatment plat in Kamien Pomorski. Basing on the performed tests determining the kind of pollutants as well as after having analysed the results obtained it can be stated, that the water in Niemica River complies with the norms provided generally for the I class of the water purity. Those parameters do not considerably change alongside the River’s course and in time.
Key words: Niemica River, Kamien Bay, waters purity state