PFAS in Sainte-Tréphine's tap water: 1.2 ng/L, 2.4x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
2.4× 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.
Sample taken in Bon Repos sur Blavet, on the same distribution network as Sainte-Tréphine (LANISCAT-ST IGEAUX-ST TREPHINE). The health authority samples one tap per network; a network carries the same treated water everywhere.
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 5 March 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.0012 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,005 µg/L |
Fails a current legal limit. Here are some filter options.
- EU legal limit
- 1.2 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 5 March 2026
- Water supplier
- SAUR FRANCE EST - ARMOR ET VILAINE
In Sainte-Tréphine, the 4 most closely watched PFAS (PFAS-4) add up to 1.2 ng/L (0.0012 µg/L) at the latest PFAS check on 5 March 2026. That's 2.4 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 1.2 ng/L (0.0012 µg/L), below the EU legal limit (100 ng/L). Sampled in Bon Repos sur Blavet, on the same network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Sainte-Tréphine
A single PFAS check has been published for Sainte-Tréphine so far (5 March 2026). A history will build up with the next checks; this page is refreshed weekly.
What the latest check found
At the latest check, the water was within every limit tested.
Values to watch
These results are close to their legal limit, or over it.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 25 mg/L | ≤ 50 mg/L | within the limit |
| Nickel | 41.3 µg/L | ≤ 20 µg/L | over the limit |
See all 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 25 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.04 mg/L | ≤ 2 mg/L | within the limit |
| Nickel | 41.3 µg/L | ≤ 20 µg/L | over the limit |
| Cadmium | 0.036 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/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 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 10 °f | no limit | for reference |
| Electrical conductivity | 289 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 20 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 3.09 mg/L | ≤ 250 mg/L | within the limit |
| Iron | <2,5 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Sainte-Tréphine safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Sainte-Tréphine's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 1.2 ng/L. The EU limit is 100 ng/L, so this water is at 1 % of the limit. (below the EU limit)
Does the water in Sainte-Tréphine 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 1.2 ng/L stays below.
How hard is the water in Sainte-Tréphine?
The water hardness in Sainte-Tréphine is 10 °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 12 September 2026.
Same water network
Same distribution network as Sainte-Tréphine, so in principle the same water.
Nearby communes
The closest to Sainte-Tréphine 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=22331
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- LANISCAT-ST IGEAUX-ST TREPHINE
Water report for Sainte-Tréphine
Get new PFAS results for Sainte-Tréphine, 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.