Nitrates (water)
Agricultural contaminant
🟠 Some signals exist (animal studies, small human studies) but results are conflicting and the scientific community is still debating them.
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In brief
nitrates in drinking water: this page reviews Nitrates (water) (Agricultural contaminant) — documented mechanism, everyday exposure situations and possible alternatives. Level of evidence: Emerging / debated.
- Where it's found
- Tap water in areas of intensive livestock farming or large-scale crops, particularly from surface-water intakes.
- Suspected mechanism
- Nitrates promote methemoglobinemia, a well-established effect especially in infants; a link with fertility remains emerging.
- Suggested alternative
- Reverse-osmosis filtration effectively removes nitrates (an activated-carbon filter does not).
- Source
- ANSES; nitrate regulations for drinking water.
Frequently asked questions
Nitrates (water): how is it linked to infertility?
Nitrates promote methemoglobinemia, a well-established effect especially in infants; a link with fertility remains emerging.
Where is Nitrates (water) found in everyday life?
Tap water in areas of intensive livestock farming or large-scale crops, particularly from surface-water intakes.
How can exposure to Nitrates (water) be reduced?
Reverse-osmosis filtration effectively removes nitrates (an activated-carbon filter does not).
What is the level of evidence for Nitrates (water)?
Emerging / debated. Some signals exist (animal studies, small human studies) but results are conflicting and the scientific community is still debating them.
Map your everyday exposures in about ten minutes.
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Related factors
Including a factor does not mean it causes infertility: it is simply worth monitoring, depending on its level of evidence.
Content last updated: September 14, 2026