The source of Çandır Göksu in the Yazılı Canyon flows into the Karacaören I. Dam Lake. There are 8 facilities which have total production capacity of 820 ton portion size trout/year and 58 000 000 number trout fry/year on the Source of Çandır Goksu. In this study, it was in-vestigated the effects of the trout aquaculture facilities on the stream by means of monthly and seasonaly measuring the physicochemical and microbiological parameters in two stations se-lected on the Source of Çandır Göksu. Avarage values of important parameters in the 1st and 2 nd stations were found 13.8-14.2oC as temparatüre; 7.80-7.93 as pH; 10.28-9.73 as dissolved oxygen; 2.57-5.44 as turbitidy JTU; 30-50 mg/L as total suspended solid matter; 4.6-7.6 mg/L as biochemical oxygen demand (20oC); 19.3-25.7 mg/L as chemical oxygen demand; 11.13-15.11 mg/L as organic matter; 0.095-0.167 mg/L as orthophosphate; 0.024-0.043 mg/L as nit-rite; 1.86-2.36 mg/L as nitrate; 0.22-0.41 mg/L as ammonium; 1011-1279 L/sn as flow rate; 0.15-0.27 mg/L as total phosphorus; 100-4410 as total coliform; 1.19x104-5.24x104 as total bacteria, respectively. As a result, it was determined that the trout aquaculture facilities on the Source of Çandır Göksu have not polluted in unacceptable levels yet. But, it have been come to a conclusion that the wastes of facilities must not certainly given in to the stream and that it must be made environmentally friendly production for he sustainability of water resources.