PFAS in Vannes's tap water: 1.4 ng/L, 2.8x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
2.8× above our health benchmark
0.5 ng/L is our benchmark, not an official limit. Same EFSA method as Sweden, Denmark and the Netherlands, but stricter. It's a yearly average, compared here with the latest check.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 84% of the cities we track
checked on 25 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.0031 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0018 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.0014 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0014 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0005 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0005 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 7.6 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 25 June 2026
- Water supplier
- CA GOLFE DU MORBIHAN - VANNES AGGLOMÉRATION
In Vannes, the 4 most closely watched PFAS (PFAS-4) add up to 1.4 ng/L (0.0014 µg/L) at the latest PFAS check on 25 June 2026. That's 2.8 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 7.6 ng/L (0.0076 µg/L), below the EU legal limit (100 ng/L). 21 checks since 13 February 2025: PFAS-4 up to 38 ng/L, sometimes below the detection limit, averaging at least 0.61 ng/L over 12 months (non-detects as 0). No clear trend. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Vannes
21 PFAS checks since 13 February 2025, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to Vannes. Samples come from 5 distribution networks. The trend refers to the network “VANNES CENTRE - MENIMUR”.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at | Network |
|---|---|---|---|---|
| 1.4 ng/L | 7.6 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| 0.7 ng/L | 8.6 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| < detection limit | < detection limit | Vannes | VANNES-LE PORT | |
| < detection limit | 6.9 ng/L | Theix-Noyalo | VANNES CEINTURE | |
| 0.7 ng/L | 4.2 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL | |
| < detection limit | 5.5 ng/L | Theix-Noyalo | VANNES CEINTURE | |
| < detection limit | 1.3 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CEINTURE +2 | |
| 0.7 ng/L | 7.3 ng/L | Vannes | HOPITAL DE VANNES | |
| < detection limit | 6.9 ng/L | Theix-Noyalo | VANNES CEINTURE | |
| < detection limit | < detection limit | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| < detection limit | 3.6 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| 0.5 ng/L | 6.8 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CEINTURE +2 |
Show the 9 earlier checks (back to 13 February 2025)
| 1.4 ng/L | 9.2 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| 1.3 ng/L | 11 ng/L | Theix-Noyalo | VANNES CEINTURE | |
| < detection limit | 0.7 ng/L | Vannes | VANNES CENTRE - MENIMUR, VANNES-LE PORT | |
| 1.5 ng/L | 12 ng/L | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| < detection limit | 6.7 ng/L | Theix-Noyalo | VANNES CEINTURE | |
| < detection limit | < detection limit | Vannes | VANNES CENTRE - MENIMUR, VANNES-LE PORT | |
| 38 ng/L | 84 ng/L | Theix-Noyalo | VANNES CEINTURE | |
| < detection limit | < detection limit | Vannes | LIZIEC-CONSEIL GÉNÉRAL, VANNES CENTRE - MENIMUR +1 | |
| < detection limit | < detection limit | Vannes | VANNES CENTRE - MENIMUR, VANNES-LE PORT |
“<” means not detected, the figure being the detection limit. “–” means not published. Labs have only reported the PFAS-4 sum (SANDRE code 9268) since autumn 2025. How to read a PFAS result
What the latest check found
At the latest check, the water was within every limit tested.
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 7.1 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,5 µg/L | ≤ 10 µg/L | within the limit |
| Copper | <0,0005 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 0.6 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 0.6 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,05 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.07 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | <0,10 mg/L | ≤ 1.5 mg/L | within the limit |
| Escherichia coli | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 8.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 7.84 °f | no limit | for reference |
| Electrical conductivity | 367 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 51.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 20.2 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 19.8 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 14 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.3 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Vannes safe to drink?
Yes. At the check on 17 July 2026, the tap water in Vannes was within every limit tested. “Eau d'alimentation conforme aux limites de qualité mais présentant une température ne satisfaisant pas à la référence à qualité fixée de 25° C, en lien avec les fortes chaleurs observées.”
How high are PFAS levels in Vannes's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 7.6 ng/L. The EU limit is 100 ng/L, so this water is at 8 % of the limit. (below the EU limit)
Does the water in Vannes also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 1.4 ng/L stays below.
Are PFAS levels rising in Vannes's tap water?
No clear trend. Since 13 February 2025, 21 checks have been published; on the main network the PFAS-4 sum ranged between 0.5 ng/L and 1.5 ng/L (5 quantified values), at times below the detection limit. pfasnearme only reports a trend from a change of at least 25 % and 1 ng/L.
How hard is the water in Vannes?
The water hardness in Vannes is 7.8 °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 September 2026.
Nearby communes
The closest to Vannes on this site.
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=56260
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 September 2026
- Supply networks
- LIZIEC-CONSEIL GÉNÉRAL, VANNES CEINTURE, VANNES CENTRE - MENIMUR, VANNES-LE PORT, HOPITAL DE VANNES
Water report for Vannes
Get new PFAS results for Vannes, with a short explanation. At most one update a week, only when there's something new.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.