This slide presentation outlines information on photodegradation of pharmaceutical and contrast media agents in surface water by direct photolysis and ultraviolet (UV) advanced oxidation. Topics covered include: reasons for using UV treatment; lamps relative irradiance; target compounds; direct injection of PhACs; UV direct photodegradation of PhACs; relative irradiance & PhACs absorbance; UV batch reactor and water matrix; reaction kinetics, direct photolysis; quantum yields; direct photolysis model input: filtered surface water; experimental and model direct photolysis in surface water; UV indirect photodegradation of PhACs; reaction kinetics; experimental and model indirect photolysis in surface water; and, implications for water treatment plants.