Another example: EPA allows up to 15 µg/L of lead in drinking water. But lower levels are known to be dangerous: “Researchers now know, blood lead levels in ch

Another example: EPA allows up to 15 µg/L of lead in drinking water. But lower levels are known to be dangerous: “Researchers now know, blood lead levels in children as low as five micrograms per deciliter — the Centers for Disease Control's "level of concern" — can lead to IQ deficits and increases in behavior problems like ADHD and conduct disorder. In adults, low-level exposure of 10 micrograms per deciliter can cause high blood pressure and kidney problems.” And the CDC has said that no level of lead in blood is safe. https://www.npr.org/sections/thetwo-way/2016/08/13/489825051/lead-levels-below-epa-limits-can-still-impact-your-health https://www.npr.org/sections/thetwo-way/2016/08/13/489825051... https://ntp.niehs.nih.gov/ntp/ohat/lead/final/monographhealtheffectslowlevellead_newissn_508.pdf https://ntp.niehs.nih.gov/ntp/ohat/lead/final/monographhealt...