Suddenly an idea came to me—a way to prove the state wrong and at the same time improve my own work. It involved the use of zip codes. For our study, Jenny and I had discovered that even if a child had “Flint” in her address, it didn’t necessarily mean that her house was receiving Flint water. Flint zip codes included kids who were not getting Flint water, and if they were included in a study, it diluted the harm.
