Integrated Assessment of Surface Water Quality in Danube River Chilia Branch

The Chilia branch is the north of Danube River at Romania-Ukraine border in Delta; it a complex system with economic and ecological values. surface water quality major concern monitoring programs have been developed national international level. objective this study was to evaluate different sampling points from mouth discharge Black Sea. assessment done individual level taking into account nutrient concentrations standard limits for good status integrative levels, using CCME WQI. longitudinal distribution GIS method. A total 106 samples were collected between 2013 2019 five points. At level, has except its levels nitrogen, due organic nitrogen contribution 2015. In 90% concentrations, low values predominate high are considered extreme; only 10% do extreme concentrations. equal percentages, 50% degree heterogeneity other concentration very close average values, homogeneity. WQI method indicated that 39.93% waters had an excellent quality, 45.45% 14.62% fair quality.