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Tap Water Nitrates: Millions at Risk
23 Apr
Summary
- Over 62 million Americans face exposure to dangerous nitrate levels.
- Nitrates linked to thyroid disease, cancers, and birth defects.
- Federal nitrate safety guidelines haven't been updated since 1962.
A concerning report reveals that over 62 million Americans, approximately one in five individuals, are potentially exposed to harmful nitrate levels in their tap water. Nitrates, originating from agricultural fertilizers and other sources, can contaminate groundwater and surface water, eventually reaching public water systems.
These invisible contaminants have been linked to a range of health problems, including thyroid disease, various cancers, preterm births, and birth defects. The Environmental Working Group (EWG) highlights that current federal guidelines for nitrate safety, established in 1962, are outdated, as studies now indicate health risks at significantly lower concentrations than previously understood.
The EWG's analysis, which mapped nitrate exposure down to 3 milligrams per liter, found that over 6,000 community water systems serving more than 62.1 million people exceeded this level. Major cities like Los Angeles, Phoenix, and Philadelphia were among those with water systems testing at or above 3 mg/L.
In communities with extremely high contamination, often from groundwater wells, over 3 million people were exposed to nitrates at or above the 10 mg/L legal limit. Experts emphasize that addressing this complex issue requires updated regulations and consumer awareness, with solutions like reverse osmosis systems recommended for at-home water purification.
