PFAS in Trévoux's tap water: 19 ng/L, 38x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
38× 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 Villeneuve, on the same distribution network as Trévoux (BDS CHATANIER). 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 98% of the cities we track
checked on 27 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.008 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.007 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.004 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.003 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.003 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.003 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 32 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 27 July 2026
- Water supplier
- SAUR FRANCE CHALON-SUR-SAONE
In Trévoux, the 4 most closely watched PFAS (PFAS-4) add up to 19 ng/L (0.019 µg/L) at the latest PFAS check on 27 July 2026. That's 38 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 32 ng/L (0.032 µg/L), below the EU legal limit (100 ng/L). Sampled in Villeneuve, on the same network. 3 checks since 8 September 2025: PFAS-4 from 19 ng/L to 21 ng/L, averaging 19.67 ng/L over 12 months. No clear trend. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Trévoux
5 PFAS checks since 10 January 2025, from the published measurements. Samples from 3 communes on the same network: it's the same water, so each one applies to Trévoux.
“Calculated”: PFAS-4 worked out from the four substances in the same sample. The chart, averages and trends use lab-published sums only.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 19 ng/L | 32 ng/L | Villeneuve | |
| 21 ng/L | 33 ng/L | Rancé | |
| 19 ng/L | 33 ng/L | Massieux | |
| 16 ng/L – < 17 ng/L · calculated | 28 ng/L | Massieux | |
| – | 32 ng/L | Massieux |
Calculated values: “<” is an upper bound from published thresholds, “≥” a lower bound, “–” means no published sum or complete measurement. 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 | 6.7 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 | 0.016 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 3.9 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within the limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.8 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 26.4 °f | no limit | for reference |
| Electrical conductivity | 605 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 42.1 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 27.5 mg/L | ≤ 250 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Trévoux safe to drink?
Yes. At the check on 27 July 2026, the tap water in Trévoux was within every limit tested. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité.”
How high are PFAS levels in Trévoux's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 32 ng/L. The EU limit is 100 ng/L, so this water is at 32 % of the limit. (below the EU limit)
Does the water in Trévoux also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 19 ng/L. That is 4.8 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The water still passes the current EU legal limit (100 ng/L for the total of 20 PFAS).
Are PFAS levels rising in Trévoux's tap water?
No clear trend. Since 10 January 2025, 3 checks have been published; on the main network the PFAS-4 sum ranged between 19 ng/L and 21 ng/L (3 quantified values), at times below the detection limit. pfasnearme only reports a trend from a change of at least 25 % and 1 ng/L. These history statistics use laboratory-published sums only.
How hard is the water in Trévoux?
The water hardness in Trévoux is 26.4 °f (medium). 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 21 September 2026.
Same water network
Same distribution network as Trévoux, so in principle the same water.
Nearby communes
The closest to Trévoux 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=01427
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- BDS CHATANIER
Water report for Trévoux
Get new PFAS results for Trévoux, 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.