Specifics are in the Wikipedia entry for the Flint water crisis. Of note, lead levels aren’t a constant. The lead is a result of deterioration of lead solderin

Specifics are in the Wikipedia entry for the Flint water crisis. Of note, lead levels aren’t a constant. The lead is a result of deterioration of lead soldering in the pipes by water over time. It’s an unknowable process for when and what lead will break off into the water. People ingested very high levels of lead - that is safe to conclude.