To amend the Safe Drinking Water Act to require the Administrator of the Environmental Protection Agency to publish a maximum contaminant level goal and promulgate a national primary drinking water regulation for microcystin toxin, and for other purposes.

This bill amends the Safe Drinking Water Act by requiring the Environmental Protection Agency to publish a maximum contaminant level goal and promulgate a national primary drinking water regulation for microcystin toxin, which is a toxin produced by a blue-green algae called cyanobacteria.