Adsorption isotherms were measured on the adsorber polymer Wofatit EP-63 for the temperature range 293...353 K for 12 typical hazardous organic pollutants commonly found in industrial and municipal wastewaters: 4 aliphatic chlorinated hydrocarbons (dichloromethane: DCM, dichloroethanes: I,1-DCE, 1,2-DCE; trichloroethane: I, I,P-TCE) 4 phenols (phenol: Ph, p-chlorophenol: PCF: p-nitrophenol: PNP: dichlorophenol: 2,4-DCP) and 4 nitroaromatics (nitrobenzene: NE, p-nitrotoluene: PNT; dinitrotoluene: 2,4 DNT; trinitrotoluene: 2, 4, 6-TNT). The adsorption capacity of this resin attained values of 0,5 g/g near the saturation state of the solutes. The potential theory in Freundlich＇s formulation is useful to describe the adsorption equilibrium. The reversibility of the adsorption makes it possible to propose adsorption-desorption cycles using only hot water as a desorbent, without additional chemicals. This allows an economical and ecological combination with biological wastewater treatment processes.