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 research and advocacy organization found. … [T]he report found that 64% of all water systems that recorded nitrate levels at or above the legal limit were in just five states: California, Texas, Kansas, Nebraska and Oklahoma. 

Other nitrate contamination news:

• SJV Water (Bakersfield, Calif.): New fill station in Tulare County provides free, clean drinking water
• CNN: Tap water toxin: ‘I remember when I could drink water from the faucet’