PFAS in Cahuzac-sur-Adour's tap water: 3 ng/L, 6x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
6× 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 Riscle, on the same distribution network as Cahuzac-sur-Adour (RESEAU RÉSERVOIR CANNET). 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 88% of the cities we track
checked on 9 March 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 3 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 9 March 2026
- Water supplier
- SIEBAG
In Cahuzac-sur-Adour, the 4 most closely watched PFAS (PFAS-4) add up to 3 ng/L (0.003 µg/L) at the latest PFAS check on 9 March 2026. That's 6 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 3 ng/L (0.003 µg/L), below the EU legal limit (100 ng/L). Sampled in Riscle, on the same network. 4 checks since 20 August 2025: sum of 20 PFAS up to 3 ng/L, sometimes below the detection limit. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Cahuzac-sur-Adour
4 PFAS checks since 20 August 2025, from the published measurements. Samples from 4 communes on the same network: it's the same water, so each one applies to Cahuzac-sur-Adour. Samples come from 2 distribution networks. The trend refers to the network “RESEAU RÉSERVOIR CANNET”.
“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 |
|---|---|---|---|---|
| 3 ng/L | 3 ng/L | Riscle | RESEAU RÉSERVOIR CANNET | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Tarsac | RESEAU RÉSERVOIR CANNET | |
| < 17 ng/L · calculated | < 100 ng/L | Lalongue | RESEAU RÉSERVOIR CANNET | |
| 3 ng/L – < 5 ng/L · calculated | 3 ng/L | Cahuzac-sur-Adour | 032000182 |
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 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | <0,50 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Arsenic | <2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,01 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/L | within the limit |
| Fluoride | 0.07 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 | 8.17 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 12.64 °f | no limit | for reference |
| Electrical conductivity | 326 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 9.2 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 65 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 14.4 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.13 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Cahuzac-sur-Adour safe to drink?
Yes. At the check on 23 July 2026, the tap water in Cahuzac-sur-Adour was within every limit tested. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité. Ce non respect des exigences porte sur la température de l'eau.”
How high are PFAS levels in Cahuzac-sur-Adour's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 3 ng/L. The EU limit is 100 ng/L, so this water is at 3 % of the limit. (below the EU limit)
Does the water in Cahuzac-sur-Adour also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 3 ng/L stays below.
Are PFAS levels rising in Cahuzac-sur-Adour'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 Cahuzac-sur-Adour?
The water hardness in Cahuzac-sur-Adour is 12.6 °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.
Same water network
Same distribution network as Cahuzac-sur-Adour, so in principle the same water.
Nearby communes
The closest to Cahuzac-sur-Adour 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=32070
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- RESEAU RÉSERVOIR CANNET
Water report for Cahuzac-sur-Adour
Get new PFAS results for Cahuzac-sur-Adour, 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.