Flint's water woes lingered.

The article offers information on the Flint water crisis and efforts to treat high lead levels in water and disease outbreaks. Topics discussed include declaration of state of emergency in Genesee County, Michigan by Michigan Governor Rick Snyder, views of environmental engineer Marc A. Edwards on the prevention of crisis by addition of orthophosphate corrosion inhibitor to the water, and outbreaks of Legionnaires' disease.