Sex hormones square measure a gaggle of endocrine disruptors excreted by humans and animals. These compounds are detected in surface waters and biodegradable pollution treatment plant (STP), everywhere the word. Due their chemistry properties vital quantity is deposited within the sediment of surface waters acting as reservoirs ready to contaminate the water column. though these compounds have origin in several sources, it's wide accepted that the most supply of those contaminants is standard atmosphere effluents. Despite toxicity and high input of this compound within the aquatic systems, very little data is offered on their concentration within the sediment and the way these compounds square measure distributed within the atmosphere. during this study, natural and artificial feminine sex hormones (estrone - E1, 17β-estradiol - E2, 17αEthinylestradiol – EE and progestin - PG) were monitored within the sediment of 3 rivers from the Iguaçu basin, South Brazil. Also, a removal estimate of those compounds by the native standard atmosphere was performed. The results showed vital concentrations of hormones, mainly E2, within the sediment samples Associate in Nursingd an inefficient removal by the standard atmosphere, leading to some cases, within the increasing of estrogens. Associate in Nursing assessment of the sediment-water partition constant (Kd) showed high quality within the atmosphere for the estrogens, in distinction to the upper affinity for the sediment of the progestin.