1 in 5 Americans Have Nitrates in Their Tap Water. Here’s What That Actually Means.
A new analysis from the Environmental Working Group (EWG) is drawing attention to nitrate levels in U.S. drinking water, and it’s worth understanding what the findings actually mean for your household.
What Are Nitrates?
Nitrates are naturally occurring compounds found in soil, water, and plants. They become a water quality concern primarily in agricultural areas, where fertilizers, animal feedlot runoff, and wastewater discharge can raise nitrate concentrations in groundwater and rivers that feed public water systems.
At very high levels, nitrates can cause a condition in infants called “blue baby syndrome,” which is why the EPA set a legal limit of 10 mg/L back in 1962. More recent research suggests that long-term exposure to lower levels may also be associated with increased risk of colorectal cancer, thyroid disease, and certain birth defects, though the science on lower-level exposure is still evolving.
How Does the Current Standard Hold Up?
The EWG analysis focused on water systems where nitrate reached 3 mg/L or higher, a level regulators use as an indicator of likely human-caused contamination. This is well below the EPA’s legal limit of 10 mg/L, but EWG argues the federal standard hasn’t kept pace with newer health research.
It’s worth noting that most water systems in the study detected nitrate below the legal limit. Still, EWG’s position is that even lower concentrations deserve more attention from regulators, and many public health researchers agree the standard is overdue for a review.
Simple Steps to Know Where You Stand
The good news is that finding out what’s in your water is easier than ever.
EcoPure offers a free 16-parameter drinking water test strip that checks for nitrates along with lead, chlorine, hardness, pH, and more. No lab needed — just dip, wait 30 seconds, and read your results. You can also look up your zip code in EWG’s Tap Water Database to see historical nitrate readings for your local water system.
If your results show elevated nitrate levels, or you simply prefer an extra layer of protection, not all filters are equally effective. Standard pitcher filters and carbon-based systems don’t remove nitrates. The options that do include:
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Reverse osmosis (RO) systems Effective at removing nitrates along with a wide range of other contaminants
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Ion exchange filters Specifically designed to target nitrates
EcoPure’s under-sink reverse osmosis systems are NSF certified to reduce nitrates, making them a reliable choice for households that want consistent filtration right at the tap.
Shop Reverse OsmosisThe Takeaway
The EWG report is a useful prompt to pay closer attention to water quality, something many of us don’t think about often enough. Federal standards set a floor, but staying informed about what’s in your water lets you make decisions that are right for your family. Testing first is always a smart place to start.