PFAS in the tap water of Caumont (Ariège): under 24 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 24 ng/L, 48 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 Cazavet, on the same distribution network as Caumont (COUSERANS ALOS). 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 10 ng/L upward. None reached that limit, so their total is below 24 ng/L rather than zero.
checked on 10 March 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,010 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,010 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,010 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,010 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,010 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,010 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
None found. The lab sees nothing below 24 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Caumont
Get new PFAS results for Caumont, 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 March 2026
- Water supplier
- SERVICE DES EAUX DU COUSERANS
In Caumont, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 10 March 2026. The total is below 24 ng/L, the sum of the detection limits and 48 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <0,002 µg/L, below the EU legal limit (100 ng/L). Sampled in Cazavet, on the same network. 3 checks since 26 August 2025, sum of 20 PFAS always below the detection limit (2 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Caumont
3 PFAS checks since 26 August 2025, from the published measurements. Samples from 3 communes on the same network: it's the same water, so each one applies to Caumont. Samples come from 3 distribution networks. The trend refers to the network “COUSERANS LADOUX”.
“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 |
|---|---|---|---|---|
| < 2 ng/L | < 2 ng/L | Cazavet | COUSERANS ALOS | |
| < 24 ng/L · calculated | < 2 ng/L | Lacourt | COUSERANS ALOS VERS FABAS | |
| < 24 ng/L · calculated | < 2 ng/L | Rivèrenert | COUSERANS LADOUX |
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: Electrical conductivity 57 µS/cm on 10 June 2025 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Electrical conductivity | 57 µS/cm | 200–1,100 µS/cm | below the reference value |
See all 6 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| 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 | 57 µS/cm | 200–1,100 µS/cm | below the reference value |
| Turbidity | 0.43 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Caumont safe to drink?
Yes. At the check on 10 March 2026, the tap water in Caumont was within every limit tested. Outside a reference value: Electrical conductivity 57 µS/cm on 10 June 2025 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Caumont's drinking water?
At the latest check the total of 20 PFAS ("forever chemicals") was below the laboratory's reporting limit of 2 ng/L. The EU limit is 100 ng/L, so this water is under 2 % of the limit. (below the EU limit)
Does the water in Caumont 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 24 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 Caumont'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 Caumont?
No hardness value is available for Caumont 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 Caumont, so in principle the same water.
Nearby communes
The closest to Caumont 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=09086
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- COUSERANS LADOUX, COUSERANS ALOS VERS FABAS, COUSERANS ALOS
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.