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Jessica Pupovac

When Monica Cosby, Tyteanna Williams and Celia Colon talk about the years they spent as inmates at women's prisons in Illinois, their stories often turn to the times they would be disciplined for what seemed like small, even absurd things.

Cosby was playing Scrabble in her cell once when a guard asked what she was doing. She responded sarcastically: "What does it look like I'm doing?" He wrote her up for "contraband" (the Scrabble set) and for "insolence."

Lead problems with the water in Flint, Mich., have prompted people across the country to ask whether they or their families have been exposed to the toxic metal in their drinking water, too.

When it comes to assessing the risk, it's important to look in the right places.

Even when municipal water systems' lead levels are considered perfectly fine by federal standards, the metal can leach into tap water from lead plumbing.