Just came across this Site / Servelet, today, thought it might prove helpful for folks 'evaluating potential BOLs' for the All Important aspect of Site Water (and, at least when checking Our area, they stated that the 'Test Source was Groundwater' - not "Off a Tap", so.. Fwiw..)
https://www.ewg.org/tapwater/
Fwiw..
jd
https://www.ewg.org/tapwater/
Fwiw..
jd