How harmful is tap water in YOUR state?

A DailyMail.com interactive map has revealed alarming levels of toxic chemicals are lurking in the tap water of some US states.

Every year, environmental health chiefs test drinking water for substances like lead, arsenic and 'forever chemicals' because of their links to hormone problems, development delays in newborns and infertility.

Water companies are only permitted to have microscopic amounts of these chemicals in their water system, and must clean their water within 30 days if levels get too high.

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