The study that article links to doesn't make any assertion about the harm on children. The author of the mother jones article doesn't seem to cite a source for his claim that it probably didn't significantly harm children. According to the CDC and EPA, there is no known safe level of lead in drinking water, and based on the blood levels that study mentioned children were definitely exposed to lead. Also keep in mind that the way lead leeching works means lead levels in water will fluctuate and can spike to very high levels, so you will see a large variance in how much lead different children were exposed to.

> It’s understandable that parents would be concerned and tend to overreact, though.

If you were living in flint at time time and were aware of the lead contamination, would you or your family consume the water?