According to the Romanian monitoring results in 2009, the Prut River is of class I (high) on 12% of its length (115 km between Stanca —Costcsti Reservoir and confluence with Bascu tributary), and class II (good) on 88%. Among the provisions is a regulation on the maintenance and operation of the Hydrotechnical Knot Stanca-Costesti on the Prut River. A Joint Subcommission for Operation of the Hy-drotcchnic Knot “Stanca-Costesti” currently acts on the basis of the Regulation from 1985,151 and the 2010 bilateral agreement on transboundary watcis.