In the article presented the condition of melioration on the agricultural uses of the podlaskie province. Actually, agricultural meliorations step out on the surface approx. 360 thousand .ha in the province, what makes up 30% total surface of agricultural use. The most devices of water meliorations detailed step on grassland and on the arable soils of good classes. The weak condition of meliorative detailed devices results: they do not allow to regulate mo-istening in soils. Bad technical condition meliorative detailed devices results from the lack of the systematic their conservation and inappropriate exploitation, and also relinquishment of use of the soils of arable and grassland. Exploited practically and conserved meliorative ditches and buildings on the meliorated objects allow to the improvement of the quality of the natural environment on country areas.