The paper presents information on the state-of-the-art of metals recovery technologies to assist in identifying waste-management options dealing with recovery for metal-bearing sludges and wastewaters that may be regulated under RCRA and the Clean Water Act. Waste treatment technologies (e.g., chemical precipitation) that could eventually result in recovery of specific metals are also included in the paper. Metals recovery technologies addressed in the paper include the following: chemical precipitation, electrolytic recovery, high-temperature metals recovery (HTMR), membrane separation, leaching, ion exchange, and evaporation. For each of these technologies, the following parameters are summarized: (1) design specifications of applicable processes, (2) waste characteristics affecting performance, (3) pretreatment/post-treatment requirements, (4) available performance data, and (5) availability of the technology and feasibility for treating various hazardous waste categories.