To direct the President to treat a harmful algal bloom caused by certain activities of the Federal Government as an emergency for purposes of the Robert T. Stafford Disaster Relief and Emergency Assistance Act, and for other purposes.

Federal Do No Harm Act of 2017 This bill directs the President to: (1) treat the impacts to state waterways and coastal estuaries of a harmful algal bloom conveyed downstream as a result of a water transfer carried out by the U.S. Army Corps of Engineers within such state as an emergency for purposes of federal emergency assistance programs under the Robert T. Stafford Disaster Relief and Emergency Assistance Act; and (2) exercise such authority to provide federal emergency assistance under such Act as necessary to address such an emergency, including exercising debris-removal authority to remove toxic algal biomass and muck.