Drinking water quality in Port-sur-Saône
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at 0.069 µg/L. The EU limit is 0.1 µg/L, so this water is at 69 % of the limit. (29 April 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.
20 PFAS (see each substance)
| Acide perfluoropentanoïque (PFPEA) | 0.031 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.015 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.012 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.011 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
Water report for Port-sur-Saône
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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. Une surveillance anticipée de certains paramètres émergents, dont les per- et polyfluoroalkylées (PFAS), a été mise en place par l’ARS. Les résultats de ce suivi ont montré des valeurs supérieures à la limite d e qualité fixée à 0,1 µg/l pour la somme des PFAS. La collectivité a engagé, en lien avec l’ARS et la préfecture, un plan d’action pour rétablir la qualité de l’eau. Les modalités de gestion sont basées sur l’application du principe de proportionnalité au regard des connaissances et expertises du moment et ne conduisent pas, à ce stade, à prononcer des restrictions d’usages de l’eau. Pour plus d’informations sur les PFAS, vous pouvez consulter le site internet de l’ARS : https://www.bourgogne-franche-comte.ars.sante.fr/les-pfas-en-bourgogne -franche-comte. L'eau peut être consommée.“
Show all 21 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 12 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,020 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within limit |
| Copper | 0.024 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 |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within limit |
| Fluoride | 0.11 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 | 7.9 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 13.6 °f | no limit | informational |
| Electrical conductivity | 284 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 6.2 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 8.1 mg/L | ≤ 250 mg/L | within limit |
| Sodium | 7.3 mg/L | ≤ 200 mg/L | within limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,50 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Port-sur-Saône safe to drink?
Yes. The latest official test (8 June 2026) checked the tap water in Port-sur-Saône and it passed every requirement.
How high are PFAS levels in Port-sur-Saône's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.069 µg/L. The EU limit is 0.1 µg/L, so this water is at 69 % of the limit. (below the EU limit)
Does the water in Port-sur-Saône 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 Port-sur-Saône?
The water hardness in Port-sur-Saône is 13.6 °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=70421
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- PORT SUR SAONE
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.