We learned a little more this week about how lead ended up flowing out the taps in Flint. Researchers at the University of Michigan have released their forensic conclusions on how the crisis took shape.

Some of the Flint evidence has more holes in it than this.
The “Swiss Cheese” Evidence
Officials had put forward a claim that failure to add anti-corrosion chemicals hadn’t impacted on the eventual contamination of the water. This assertion was undermined by the researchers’ discovery of “a Swiss cheese pattern” in the aging pipework cause by corrosion.
The research team goes on to emphasize the importance of ensuring that anti-corrosion chemicals are used in all of America’s aging water systems to prevent lead-laced water reaching …
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