PFAS in Treffrin's tap water: 1 ng/L, 2x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
2× 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 82% of the cities we track
checked on 19 May 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.0094 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,005 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,005 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 10.4 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 19 May 2026
- Water supplier
- SAUR FRANCE EST - ARMOR ET VILAINE
In Treffrin, the 4 most closely watched PFAS (PFAS-4) add up to 1 ng/L (0.001 µg/L) at the latest PFAS check on 19 May 2026. That's 2 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 10.4 ng/L (0.0104 µg/L), below the EU legal limit (100 ng/L). 2 checks since 16 March 2026: PFAS-4 up to 1 ng/L, sometimes below the detection limit. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Treffrin
2 PFAS checks since 16 March 2026, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to Treffrin.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 1 ng/L | 10.4 ng/L | Treffrin | |
| < detection limit | < detection limit | Trébrivan |
“<” 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 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 12 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Arsenic | <0,5 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,025 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <0,5 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.058 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 | 8.3 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 10 °f | no limit | for reference |
| Electrical conductivity | 313 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 35 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 19 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 16 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 2.6 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.23 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Treffrin safe to drink?
Yes. At the check on 19 May 2026, the tap water in Treffrin was within every limit tested. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Treffrin's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 10.4 ng/L. The EU limit is 100 ng/L, so this water is at 10 % of the limit. (below the EU limit)
Does the water in Treffrin 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 ng/L stays below.
Are PFAS levels rising in Treffrin's tap water?
Too few quantified checks to say (1 since 16 March 2026). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Treffrin?
The water hardness in Treffrin 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 Treffrin, so in principle the same water.
Nearby communes
The closest to Treffrin 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=22351
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- SDC CENTRE BRETAGNE PAR K.UHEL
Water report for Treffrin
Get new PFAS results for Treffrin, 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.