The Study of seasonal changes of phosphorus quantity and forms found in domestic wastewater of Elazığ city

In this study, seasonal changes of phosphorus quantity and forms found in domestic wastewater oi Elazığ City have been investigefed. Data obtained from the chemical analysis had using standart methods on water samples taken from the discharge point of the wastewater of Elazığ City in to Haringet Stream of Elazığ indicates that phosphorus quantity and forms veries depending upon seasons. Phosphorus componds should be attached importance to while domestic wastewater treatment plant is operating in order that these dirty things incharced domestic wastewater don' t affect Keban Dam Lake in negative sence from the point of viev plant ndurischment. Key Words: Domestic wastewater, phosphorus, total phosphorus, inorganic phosphorus, orthophosphorus, lake pollution, treatment efficiencies.