PFAS in Montreux-Vieux's tap water: 8 ng/L, 16x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
16× 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 95% of the cities we track
checked on 16 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-octanoïque (PFOA) | 0.008 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.003 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 11 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 16 June 2026
- Water supplier
- MAIRIE DE MONTREUX VIEUX
In Montreux-Vieux, the 4 most closely watched PFAS (PFAS-4) add up to 8 ng/L (0.008 µg/L) at the latest PFAS check on 16 June 2026. That's 16 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 11 ng/L (0.011 µg/L), below the EU legal limit (100 ng/L). 2 checks since 25 June 2025: sum of 20 PFAS from 11 ng/L to 12 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Montreux-Vieux
2 PFAS checks since 25 June 2025, from the published measurements.
“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 |
|---|---|---|
| 8 ng/L – < 14 ng/L · calculated | 11 ng/L | |
| 9 ng/L – < 15 ng/L · calculated | 12 ng/L |
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.
Values to watch
These results are close to their legal limit, or over it.
Outside a reference value: pH 6.2 unité pH on 6 July 2026 (reference 6.5–9 unité pH). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 38 mg/L | ≤ 50 mg/L | within the limit |
| pH | 6.2 unité pH | 6.5–9 unité pH | below the reference value |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 38 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 1.3 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0418 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 0.6 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 0.4 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,01 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.44 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <0,01 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.05 mg/L | ≤ 1.5 mg/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 | 6.2 unité pH | 6.5–9 unité pH | below the reference value |
| Water hardness | 7.3 °f | no limit | for reference |
| Electrical conductivity | 210 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 21 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 4 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 11 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 37 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Montreux-Vieux safe to drink?
Yes. At the check on 6 July 2026, the tap water in Montreux-Vieux was within every limit tested. Outside a reference value: pH 6.2 unité pH on 6 July 2026 (reference 6.5–9 unité pH). These are indicator parameters with reference values, not legal limits. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité. La référence de qualité n'est pas respectée pour le paramètre pH. Eau susceptible, dans certaines conditions défavorables (stagnation, chauffe-eau...) de dissoudre certains métaux des canalisations. Le matin ou après quelques jours d'absence, il est conseillé de ne consommer l'eau du robinet qu'après un écoulement de 15 à 30 secondes. L'absence de canalisation en plomb dans les parties privatives des réseaux doit être vérifiée.”
How high are PFAS levels in Montreux-Vieux's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 11 ng/L. The EU limit is 100 ng/L, so this water is at 11 % of the limit. (below the EU limit)
Does the water in Montreux-Vieux also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 8 ng/L. That is 2 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 Montreux-Vieux's tap water?
Calculated PFAS-4 values are listed in the table. The chart uses laboratory-published sum-of-20 results; there are too few laboratory-published PFAS-4 sums for the existing trend calculation.
How hard is the water in Montreux-Vieux?
The water hardness in Montreux-Vieux is 7.3 °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 21 September 2026.
Nearby communes
The closest to Montreux-Vieux 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=68215
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- MONTREUX VIEUX
Water report for Montreux-Vieux
Get new PFAS results for Montreux-Vieux, 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.