Is Your Tap Water Safe? What is it Safe for?

https://www.ewg.org/tapwater/index.php#results-by-state-map

Since 2010, water utilities' testing has found pollutants in Americans' tap water, according to an EWG drinking water quality analysis of 30 million state water records.

Chromium-6 in Tap Water: Why the 'Erin Brockovich' Chemical Is Dangerous

Environments Well Water Uranium and Your Health - CDC Tracking Network

Is There Radium In Your Tap Water? New Map Can Show You

Trihalomethanes, chlorite, chlorate in drinking water and risk of congenital anomalies: A population-based case-control study in Northern Italy - ScienceDirect

What to do if your drinking water contains arsenic | Center for Public Integrity

https://www.hsph.harvard.edu/magazine/magazine_article/fluoridated-drinking-water/