The project implementation team completed the water quality assessment report based on aquatic invertebrates. The purpose of the report was to have a detailed picture of the species composition and water quality class on Gilort River. Aquatic invertebrates are extremely effective tools in assessing water quality due to the large populations with varying degrees of tolerance to various changes in the forms of environmental pressure. They also have a relatively long life cycle and different ecological roles and are relatively easy to collect, identify and classify.