"Hydrometeorology and Monitoring Center" of the Ministry of Environment  on June 5, field research works and water sampling were carried out in Lake Vardavar. Preliminary analyzes of the samples have been carried out and according to the preliminary results, the value of dissolved oxygen in the water is very low and is not sufficient to sustain the life of the fish. The water is weakly basic, with especially high concentrations of ammonium (3rd, "moderate" class) and sulfate ions (5th, "poor" class).