https://grist.org/project/updates/interactive-chicago-lead-map/
https://grist.org/accountability/chicago-lead-pipe-replacement-map-health/
Chicago has the most lead pipes in the nation. We mapped them all. (Grist, WBEZ)
we need more of this, and we need to correlate it with things like crime rates and educational outcomes—i think there is data already showing the correlation pretty strongly