Annotation. The article deals with the influence of the irrigative water quality on soil meliorative state and ecology. The higher qualitative water creates a healthy ecological environment by affecting the soil meliorative state. This article informs us about rivers, lakes, sea, slop and underground waters and about usage opportunities from such waters in agricultural plants irrigation. The terms of the international and interstates standards must be fulfilled in irrigative water use. A

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... y of the injurious substances should be at a permissible limit. The water used in trickling and subsoil irrigation must be clean and limpid, the sizes of the particles floating in irrigation by the water-sprinkler machines and installations must be fitting to the exit diameter of the spraying apparatus tip. The very turbid water on the surface irrigation creates difficulties in growing works by affecting the agricultural plants development negatively. The organic and mineral content of water render an influence on organoleptic indicators. The permissible limit improves irrigative water quality. The qualitative waters play an important role in humus quantity increase.