PFAS in the tap water of Fossé (Ardennes): 37 ng/L, 74x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
74× 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 Briquenay, on the same distribution network as Fossé (S16 BUZANCY). 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 100% of the cities we track
checked on 17 December 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-octanoïque (PFOA) | 0.026 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.011 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.011 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.007 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.003 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 60 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 17 December 2025
- Water supplier
- SIAEP DE BUZANCY
In Fossé, the 4 most closely watched PFAS (PFAS-4) add up to 37 ng/L (0.037 µg/L) at the latest PFAS check on 17 December 2025. That's 74 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 60 ng/L (0.06 µg/L), below the EU legal limit (100 ng/L). Sampled in Briquenay, on the same network. 7 checks since 23 May 2025: sum of 20 PFAS from 56 ng/L to 68 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Fossé
7 PFAS checks since 23 May 2025, from the published measurements. Samples from 6 communes on the same network: it's the same water, so each one applies to Fossé.
“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 |
|---|---|---|---|
| 37 ng/L – < 39 ng/L · calculated | 60 ng/L | Briquenay | |
| 42 ng/L – < 44 ng/L · calculated | 68 ng/L | Fossé | |
| 39 ng/L – < 41 ng/L · calculated | 64 ng/L | Harricourt | |
| 40 ng/L – < 42 ng/L · calculated | 63 ng/L | Autruche | |
| 38 ng/L – < 40 ng/L · calculated | 59 ng/L | Buzancy | |
| 35 ng/L – < 37 ng/L · calculated | 56 ng/L | Buzancy | |
| 36 ng/L – < 38 ng/L · calculated | 62 ng/L | Bar-lès-Buzancy |
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 |
|---|---|---|---|
| Nitrate | 37.4 mg/L | ≤ 50 mg/L | within the limit |
See all 16 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 37.4 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.8 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.016 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 1.1 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,5 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 | 7.5 unité pH | 6.5–9 unité pH | within the limit |
| Electrical conductivity | 540 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 7.9 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 15.2 mg/L | ≤ 250 mg/L | within the limit |
| Iron | <5 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Fossé safe to drink?
Yes. At the check on 9 January 2026, the tap water in Fossé was within every limit tested. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité. La référence de qualité relative à la présence de germes aérobies revivifiables à 36°C n'est pas satisfaite. Une vérification des installations peut s'avérer nécessaire, notamment le traitement de désinfection s'il existe.”
How high are PFAS levels in Fossé's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 60 ng/L. The EU limit is 100 ng/L, so this water is at 60 % of the limit. (below the EU limit)
Does the water in Fossé also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 37 ng/L. That is 9.3 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 Fossé'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 Fossé?
No hardness value is available for Fossé in this source.
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 Fossé, so in principle the same water.
Nearby communes
The closest to Fossé 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=08176
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- S16 BUZANCY
Water report for Fossé
Get new PFAS results for Fossé, 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.