From the transcript:
EUGENE PURYEAR: Yeah, absolutely. I mean, it’s pretty stunning, when you look at it. Many people forget, but shortly after the Flint crisis broke, USA Today actually did a study and found over 2000 localities that had low levels of lead in the water that were actually higher than Flint. That was in early 2017 they did that study. Reuters did subsequently, later in that year, did a similar study where they looked at about 3000 census tracks- they actually looked at more than that, but they found about 3000 census tracks around the country that also had higher lead levels in water, and also in terms of the lead blood level than what we were finding of people in Flint.