The study was conducted in 2011 on 6-years-old citrus trees "Washington navel 141". It contained four treatments with three replicates for each treatment. The results showed that: The wastewater treatments showed superiority on the control in the number of vegetative growth and its length. The number of inflorescence buds, was increased in the second treatment (irrigation with 50% treated wastewater +50% normal water) (5. 37) which dominated the other treatments. The weight of fruit was affected by treated wastewater irrigation. Second treatment (irrigation with 50%treated wastewater+50 % normal water) was better than the control treatment. It was increased by (308. 3 g) compared to (259. 5 g) for the control treatment. Fruit yield production per tree, was increased by second treatment (irrigation with 50% treated wastewater+50 % normal water) (28. 9kg) compared to (15. 3kg) for the control. Treated wastewater irrigation had positive effects in the quality of fruit (Total sugar %), (T. S. S %) and the coefficient of maturity were increased in second and third treatment compared to other treatments, while (T. A %) was decreased in all wastewater treatments.