Drinking water quality in Montferrand-le-Château
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at 0.007 µg/L. The EU limit is 0.1 µg/L, so this water is at 7 % of the limit. (4 May 2026)
The four most harmful PFAS add up to 0.007 µg/L. That is 1.8 times the health limit of 0.004 µg/L that Sweden made law in 2026. Germany will set a similar limit in 2028.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
Substances too small to measure count as 0, so the real total may be higher.
20 PFAS (see each substance)
| Acide sulfonique de perfluorooctane (PFOS) | 0.007 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
Water report for Montferrand-le-Château
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Official assessment
The authorities have not published an overall verdict for this water.
„EAU CONFORME (code de la santé publique) L'eau prélevée respecte les exigences de qualité réglementaires des eaux destinées à l'alimentation humaine pour les paramètres analysés.“
Show all 20 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 2.6 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within limit |
| Copper | 0.0813 mg(Cu)/L | ≤ 2 mg(Cu)/L | within limit |
| Nickel | <2 µg/L | ≤ 20 µg/L | within limit |
| Arsenic | <5 µg/L | ≤ 10 µg/L | within limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within limit |
| Chromium | <2 µg/L | ≤ 50 µg/L | within limit |
| Fluoride | 0.09 mg/L | ≤ 1.5 mg/L | within limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within limit |
| pH | 7.6 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 26.1 °f | no limit | informational |
| Electrical conductivity | 513 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 9.6 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 9.3 mg/L | ≤ 250 mg/L | within limit |
| Sodium | 5.74 mg/L | ≤ 200 mg/L | within limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,2 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Montferrand-le-Château safe to drink?
All the values shown here (4 May 2026) are within the legal limits, but the authorities have not published an overall verdict for this water.
How high are PFAS levels in Montferrand-le-Château's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.007 µg/L. The EU limit is 0.1 µg/L, so this water is at 7 % of the limit. (below the EU limit)
Does the water in Montferrand-le-Château also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 0.007 µg/L. That is 1.8 times the health limit of 0.004 µg/L that Sweden made law in 2026. The water still passes the current EU limit (0.1 µg/L for the total of 20 PFAS).
How hard is the water in Montferrand-le-Château?
The water hardness in Montferrand-le-Château is 26.1 °f (medium). This mainly matters for household appliances and detergent dosing, not for health.
Where does this data come from?
All values come from official publications: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM). Retrieved on 28 August 2026.
Data source
- Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM)
- https://hubeau.eaufrance.fr/api/v1/qualite_eau_potable/resultats_dis?code_commune=25397
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- GBM GRANDFONTAINE MONTFERRAND VELESMES
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.