First there was Flint, Michigan’s horrific revelations of high levels of lead in the city’s water supply. Last week, Tacoma revealed that it had found high levels of lead in samples taken from older homes, and this morning it was reported that two Tacoma schools tested for lead in its water last year. This has raised questions about whether the residents of Seattle should also be concerned about lead in their water. This morning, officials from Seattle Public Utilities briefed the City Council on the issue, and the good news is that almost no one in Seattle should be worried. But understanding how lead gets into the water, who is at risk, and what SPU does to ensure our water is high-quality, is a complicated affair worth taking a few minutes to understand.