What kind of water treatment removes cyanobacterial toxins ?
According to EPA, water treatment techniques such as coagulation, sedimentation, filtration, disinfection, granular activated carbon, powdered activated carbon, ozonation, and ultraviolet radiation are effective to varying degrees at removing most common cyanobacteria and their toxins in drinking water. Close to 100 percent of particular toxins can be eliminated in finished water when the appropriate combination of techniques is used. However, some treatments such as copper sulfate can cause cells to disintegrate and produce increased toxin concentrations in surrounding waters. See the following link for more information: EPA Report 815-D-06-007 Chapter 15: Microorganisms on the CCL2 (PDF).
