PFAS in the tap water of Bonnevaux (Doubs): under 4 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
No PFAS detected
The lab sees nothing below 4 ng/L, 8 times our benchmark of 0.5 ng/L. Water above our benchmark would pass this check unnoticed.
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 Étalans, on the same distribution network as Bonnevaux (SIEHL BAS SERVICE). 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.
The lab detects each of the four substances from 1 ng/L upward. None reached that limit, so their total is below 4 ng/L rather than zero.
checked on 10 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
None found. The lab sees nothing below 4 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Bonnevaux
Get new PFAS results for Bonnevaux, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- none detected sum of 20 PFAS below the detection limit, limit 100 ng/L
- Last PFAS test
- 10 June 2026
- Water supplier
- CC DU PLATEAU DE FRASNE ET DU VAL DU DRUGEON (CFD)
In Bonnevaux, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 10 June 2026. The total is below 4 ng/L, the sum of the detection limits and 8 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <0,029 µg/L, below the EU legal limit (100 ng/L). Sampled in Étalans, on the same network. 4 checks since 19 August 2025, PFAS-4 always below the detection limit (4 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Bonnevaux
6 PFAS checks since 4 March 2025, from the published measurements. Samples from 3 communes on the same network: it's the same water, so each one applies to Bonnevaux. Samples come from 2 distribution networks. The trend refers to the network “SIEHL BAS SERVICE”.
“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 | Network |
|---|---|---|---|---|
| < 4 ng/L | < 29 ng/L | Étalans | SIEHL BAS SERVICE | |
| < 4 ng/L | < 29 ng/L | Échevannes | SIEHL BAS SERVICE | |
| < 4 ng/L | < 29 ng/L | Bonnevaux | CFD BONNEVAUX | |
| < 4 ng/L | < 29 ng/L | Échevannes | SIEHL BAS SERVICE | |
| < 4 ng/L · calculated | < 100 ng/L | Échevannes | SIEHL BAS SERVICE | |
| < 4 ng/L · calculated | < 100 ng/L | Échevannes | SIEHL BAS SERVICE |
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.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Lead | 7.3 µg/L | ≤ 10 µg/L | within the limit |
See all 20 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 3.4 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 7.3 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.495 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 2 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <1 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <2 µg/L | ≤ 50 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 | 7.7 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 22.8 °f | no limit | for reference |
| Electrical conductivity | 407 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 1.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 2.3 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 0.389 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 28.1 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.21 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Bonnevaux safe to drink?
Yes. At the check on 7 July 2026, the tap water in Bonnevaux was within every limit tested. “EAU CONFORME (code de la santé publique). L'eau prélevée respecte les exigences de qualité réglementaire des eaux destinées à l'alimentation humaine pour les paramètres analysés. Cependant, les concentrations en chlore sont élevées ce qui entraînent des désagréments pour les usagers et peuvent conduire à la production de substances organochlorées. Il convient de maintenir un résiduel en chlore libre de 0,1 mg/l en distribution.”
How high are PFAS levels in Bonnevaux's drinking water?
At the latest check the total of 20 PFAS ("forever chemicals") was below the laboratory's reporting limit of 29 ng/L. The EU limit is 100 ng/L, so this water is under 29 % of the limit. (below the EU limit)
Does the water in Bonnevaux also meet the strictest limits in Europe?
As far as this check can tell, yes. None of the four compounds was quantified, so their total is below 4 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
Are PFAS levels rising in Bonnevaux's tap water?
No. Since 4 March 2025, 4 checks have been published and the PFAS-4 sum stayed below the laboratory's detection limit (4 ng/L) every time. These history statistics use laboratory-published sums only.
How hard is the water in Bonnevaux?
The water hardness in Bonnevaux is 22.8 °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 Bonnevaux, so in principle the same water.
Nearby communes
The closest to Bonnevaux 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=25075
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CFD BONNEVAUX, SIEHL BAS SERVICE
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.