PFAS in Carcen-Ponson's tap water: under 17 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 17 ng/L, 34 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 Tartas, on the same distribution network as Carcen-Ponson (TARTAS_CARCARES_CARCEN-P.). 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 2 to 5 ng/L upward. None reached that limit, so their total is below 17 ng/L rather than zero.
checked on 9 April 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorododécane sulfonique (PFDoDS) | <0,005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,005 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,005 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,005 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,005 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,02 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,005 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,005 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,005 µg/L |
None found. The lab sees nothing below 17 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Carcen-Ponson
Get new PFAS results for Carcen-Ponson, 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
- 9 April 2026
- Water supplier
- S.Y.D.E.C
In Carcen-Ponson, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 9 April 2026. The total is below 17 ng/L, the sum of the detection limits and 34 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <0,1 µg/L, below the EU legal limit (100 ng/L). Sampled in Tartas, on the same network. 2 checks since 23 April 2025, sum of 20 PFAS always below the detection limit (100 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Carcen-Ponson
2 PFAS checks since 23 April 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 | Sampled at |
|---|---|---|---|
| < 17 ng/L · calculated | < 100 ng/L | Tartas | |
| < 17 ng/L · calculated | < 100 ng/L | Tartas |
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 16 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | <0,1 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.33 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0616 mg/L | ≤ 2 mg/L | within the limit |
| Nickel | 1.4 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,025 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,25 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 | 8.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 8.9 °f | no limit | for reference |
| Electrical conductivity | 240 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 15 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | <0,2 mg/L | ≤ 250 mg/L | within the limit |
| Turbidity | <0,5 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Carcen-Ponson safe to drink?
Yes. At the check on 9 April 2026, the tap water in Carcen-Ponson 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 Carcen-Ponson's drinking water?
At the latest check the total of 20 PFAS ("forever chemicals") was below the laboratory's reporting limit of 100 ng/L. The EU limit is 100 ng/L, so this water is under 100 % of the limit. (below the EU limit)
Does the water in Carcen-Ponson also meet the strictest limits in Europe?
The check cannot say. None of the four compounds was quantified, but the laboratory's detection limits add up to 17 ng/L, above Sweden's legal limit of 4 ng/L in force since 2026, so a value between the two would go unnoticed.
Are PFAS levels rising in Carcen-Ponson'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 Carcen-Ponson?
The water hardness in Carcen-Ponson is 8.9 °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 Carcen-Ponson, so in principle the same water.
Nearby communes
The closest to Carcen-Ponson 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=40067
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- TARTAS_CARCARES_CARCEN-P.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.