Rotenone Safety Issues
Rotenone is approved in both US and Canada for various purposes including pesticide dusts.
EPA and other health information
A scorecard of health information on rotenone is available here. The page includes links to the US Environmental Protection Agency summaries of information existing or lacking.
Fisheries Information
The Oregon Department of Fish & Wildlife has a Q&A on rotenone.
Fisheries.org has an extensive web site on the uses and risks of rotenone.