This study was conducted to find out the nutritional value of tilapia fish found in Ain Tawergha water. As well as to assess the suitability of Ain Tawergha water for growth and development of Tilapia fish. Samples of tilapia fish were caught directly from the Tawerghan basins by fishing nets, and water samples were taken from the same fishing site for analysis. The results obtained from the water samples indicated that the quantities of calcium, magnesium, sodium, and potassium were 292, 147, 494 (and 33 mg/l), respectively, while the amount of chlorine was 915 mg / l, and the water pH was 7.4 and the total dissolved salts were 2940 mg /l. The water was good in transparency and clean without turbidity.   The results also showed that the amount of protein , carbohydrates and fats in fish muscle were 22.086 , 0 and 1.87 g, respectively. The minerals in muscles, calcium, iron and sodium were 12, 0.54, 56 mg, respectively. The cholesterol n muscles  was 50 mg. It was also found that tilapia was rich in important fatty acids for the body (omega-3, which was 0.14 mg).