A guide to confirmed geosmin- and MIB-producing cyanobacteria isolated in the United States is being prepared. This document will include 41 different species or morphologically distinct types from eight states and diverse aquatic sources isolated over a 22-year period. The organisms comprised by this guide demonstrate the importance of attached cyanobacteria as off-flavor agents, the strain specificity of MIB production, the existence of unicellular MIB producers, the occurrence of multiple geosmin and MIB producers in reservoirs, and the relationship of certain planktonic odor producers to species in other countries.

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