Drinking water quality in Saint-Barthélemy
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at 0.001 µg/L. The EU limit is 0.1 µg/L, so this water is at 1 % of the limit. (10 June 2026)
The four most harmful PFAS add up to 0 µg/L, below the health limit of 0.004 µg/L used in Sweden since 2026.
Substances too small to measure count as 0, so the real total may be higher.
10 PFAS (see each substance)
| Acide sulfonique de perfluorobutane (PFBS) | 0.001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
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Official assessment
The latest official test passed all quality requirements.
„Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés. On note également la présence de légionelles (cf arrêté préfectoral n°04-811 du 15/06/2004). La présence de ce paramètre impose une surveillance renforcée. Il convient de prendre toutes les mesures nécessaires pour éviter que cela ne se reproduise. Ce prélèvement est un recontrôle effectué suite aux contrôles supplémentaires ajoutés les 22, 23 et 30 juin au contrôle sanitaire suite à la remise en eau du réseau après la coupure d'alimentation induise par l'effondrement du réservoir de tête le 13 juin 2026 et ayant présenté des dépassements de la limite de qualité pour les bromates ainsi que la présence de légionelles. L'interdiction de consommation prise par la collectivité le 19 juin 2026 est maintenue. De nouveaux recontrôles ont été réalisés le 17 juillet 2026.“
Show all 19 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | <0,50 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 | <0,010 mg(Cu)/L | ≤ 2 mg(Cu)/L | within limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within limit |
| Arsenic | <2 µg/L | ≤ 10 µg/L | within limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within limit |
| Fluoride | <0,05 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 | 8.5 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 5.07 °f | no limit | informational |
| Electrical conductivity | 582 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 140 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 2.5 mg/L | ≤ 250 mg/L | within limit |
| Sodium | 122 mg/L | ≤ 200 mg/L | within limit |
| Turbidity | 0.17 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Saint-Barthélemy safe to drink?
Yes. The latest official test (30 June 2026) checked the tap water in Saint-Barthélemy and it passed every requirement.
How high are PFAS levels in Saint-Barthélemy's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.001 µg/L. The EU limit is 0.1 µg/L, so this water is at 1 % of the limit. (below the EU limit)
Does the water in Saint-Barthélemy also meet the strictest limits in Europe?
Yes. Even against Europe's strictest limit, the health limit of 0.004 µg/L used in Sweden since 2026, the measured value of 0 µg/L stays below.
How hard is the water in Saint-Barthélemy?
The water hardness in Saint-Barthélemy is 5.07 °f (soft). 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=97701
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- SAINT-BARTHELEMY
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.