Nitrate contaminates the drinking water of millions of Americans, study finds

By: Kevin Hardy

Outlets: Stateline

Published: April 23, 2026

Words: 585

Last Updated: 3 months, 1 week ago

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Nearly one-fifth of Americans relied on drinking water systems with elevated and potentially dangerous levels of nitrate in recent years, according to a new study released Thursday.

The nonprofit Environmental Working Group examined test data collected by water systems across the country between 2021 and 2023, the most recent data available.

Water systems serving more than 3 million people exceeded the federal safety limit of 10 milligrams per liter over the three years, the …

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