What nitrate level is acceptable in tap water?

The regulatory limit for drinking water is 50 mg/L in France as in the European Union. For infants and pregnant women, health authorities often recommend staying at a lower value as a precaution.

Are nitrates dangerous for a baby?

Infants are the most sensitive group: exposure to high levels is associated with a risk of methaemoglobinaemia, also known as blue baby syndrome. If you prepare bottles, check your network value and follow the recommendations of your health authority or doctor.

Does a filter pitcher remove nitrates?

Not effectively. A standard filter pitcher mainly targets taste. To reduce nitrates, only reverse osmosis or specific ion-exchange resins are relevant.

Should I switch to bottled water?

Only in specific situations, notably a reported exceedance and infant feeding, on the recommendation of health authorities. Otherwise, start by checking the actual value for your network.

Nitrates guide

Nitrates in tap water: risks and solutions

Q: Where do nitrates in water come from?

Mostly from agricultural nitrogen inputs carried by run-off and infiltration into the groundwater and rivers used as drinking water resources.

Nitrates are nitrogen compounds naturally present in the environment, and their concentration in water intended for human consumption is regulated at European and French level.

The regulatory limit for drinking water is 50 mg/L. Below that value, the water supplied is considered compliant for the general population.

For infants and pregnant women, health authorities frequently recommend a lower precautionary value. For any individual situation, the reference remains your regional health agency, the Ministry of Health or Anses.

Run the diagnostic Check my municipality

This page is informative and replaces neither medical advice nor the official analysis results for your distribution network.

Where do nitrates in water come from?

Nitrates found in water mainly come from agricultural nitrogen inputs (fertilisers, livestock effluents) carried by run-off and infiltration into groundwater and rivers.

That is why values vary widely between areas: they depend on the abstracted resource and on land use around the abstraction point, not on your home.

Am I concerned?

The only way to know is to look at the value actually measured on your network and published in the official analyses.

Open your municipality page to see the nitrate value recorded for your network.
Use the diagnostic if you want to know which water to favour for your profile (infant, pregnancy).
If an exceedance is reported, follow the instructions of your regional health agency and water utility, which take precedence over any general information.

Water quality by municipality Water diagnostic

What works, and what does not

Nitrates are dissolved ions: most household devices sold to improve taste have no significant effect on them. This is the most widely misunderstood point.

1.A standard filter pitcher does not effectively remove nitrates

An activated carbon pitcher mainly acts on taste (chlorine, some organic compounds). It should not be bought with the aim of reducing nitrates.

2.Boiling does not reduce nitrates

Boiling water does not remove nitrates: as part of the water evaporates, the remaining ions can even become slightly more concentrated.

3.Reverse osmosis

Reverse osmosis is one of the few household technologies genuinely effective on nitrates. It requires an under-sink installation, regular maintenance, and also removes useful minerals.

4.Specific ion-exchange resins

Some resins are designed specifically to capture nitrates. Check that the device explicitly mentions nitrates: an anti-scale resin does not treat them.

Which water filter to choose Filter pitcher comparison

Limits and when to act

If the value measured on your network is clearly below the regulatory limit, installing nitrate-specific equipment has no demonstrated benefit.

In case of an exceedance, the utility and the health authority manage corrective measures and inform users, including any recommendations concerning infants.

For an individual situation (pregnancy, infant feeding, medical condition), speak to a health professional or the health authorities rather than an equipment seller.

Our recommendations for every budget

Three options by budget level. Each product is listed with what it actually treats and its limits.

This page contains Amazon affiliate links. InfoEau earns a commission on purchases made through these links, at no extra cost to you. Our recommendations are based solely on the proven effectiveness of the products, independently of any commercial partnership.

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