[nahnahno]

2.5-3 micrograms per deciliter is nothing. Wouldn’t even come up as elevated by current childhood screening guidelines. I very much doubt 2-3 IQ point difference.

[cma]

That's the average, so it would be much high the cities in the cities than rurally right?

[HeatrayEnjoyer]

I wouldn't call it nothing.

Current regulation requires water supply at the tap to measure <10 µg/L, changing to <5 µg/L next decade.

2-3 µg/L is significant.

[s1artibartfast]

You are comparing level in the blood and water.

[elcritch]

Worse the parent says 2-3 μg/dL or 20-30 μg/L right?