PFAS in the tap water of Saint-Clair (Ardèche): 22 ng/L, 44x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
44× 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 Charnas, on the same distribution network as Saint-Clair (SYND ANN. SERR. UDI LIMONY). 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.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 99% of the cities we track
checked on 23 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.012 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.007 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.003 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.003 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 39 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 23 July 2026
- Water supplier
- SAUR ANNONAY
In Saint-Clair, the 4 most closely watched PFAS (PFAS-4) add up to 22 ng/L (0.022 µg/L) at the latest PFAS check on 23 July 2026. That's 44 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 39 ng/L (0.039 µg/L), below the EU legal limit (100 ng/L). Sampled in Charnas, on the same network. 10 checks since 3 July 2025: PFAS-4 from 18 ng/L to 27 ng/L, averaging 23.5 ng/L over 12 months. Falling on the main network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Saint-Clair
40 PFAS checks since 10 February 2023, from the published measurements. Samples from 5 communes on the same network: it's the same water, so each one applies to Saint-Clair. Samples come from 2 distribution networks. The trend refers to the network “SYND ANN. SERR. UDI TERRES CARREES”.
“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 |
|---|---|---|---|---|
| 22 ng/L | 39 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 21 ng/L | 52 ng/L | Talencieux | SYND ANN. SERR. UDI LIMONY | |
| 18 ng/L | 47 ng/L | Bogy | SYND ANN. SERR. UDI TERRES CARREES | |
| 24 ng/L | 61 ng/L | Peaugres | SYND ANN. SERR. UDI TERRES CARREES | |
| 24 ng/L | 60 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 27 ng/L | 69 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 26 ng/L | 74 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 25 ng/L | 68 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 24 ng/L | 61 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 19 ng/L | 39 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 19 ng/L · calculated | 54 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 18 ng/L · calculated | 52 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES |
Show the 28 earlier checks (back to 10 February 2023)
| 15 ng/L · calculated | 33 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 21 ng/L · calculated | 65 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 25 ng/L · calculated | 74 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 25 ng/L · calculated | 70 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 27 ng/L · calculated | 70 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 24 ng/L · calculated | 68 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 24 ng/L · calculated | 55 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 26 ng/L · calculated | 57 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 23 ng/L · calculated | 65 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 20 ng/L · calculated | 50 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 20 ng/L · calculated | 46 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 23.5 ng/L · calculated | 60.1 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 22.7 ng/L · calculated | 69.7 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 24.9 ng/L · calculated | 55.3 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 21.1 ng/L · calculated | 64.3 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 33.7 ng/L · calculated | 105 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 22.6 ng/L · calculated | 73.8 ng/L | Bogy | SYND ANN. SERR. UDI TERRES CARREES | |
| 22.4 ng/L · calculated | 59.7 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| – | 57.1 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 41.7 ng/L · calculated | 123.6 ng/L | Bogy | SYND ANN. SERR. UDI TERRES CARREES | |
| 19 ng/L · calculated | 54.8 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 16.2 ng/L · calculated | 59.7 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 14.9 ng/L · calculated | 56.6 ng/L | Bogy | SYND ANN. SERR. UDI TERRES CARREES | |
| 32.9 ng/L · calculated | 113.6 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES | |
| 53.5 ng/L · calculated | 127.3 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 20.7 ng/L · calculated | 80.7 ng/L | Bogy | SYND ANN. SERR. UDI TERRES CARREES | |
| 29.7 ng/L – < 34.7 ng/L · calculated | 78.7 ng/L | Charnas | SYND ANN. SERR. UDI LIMONY | |
| 17.6 ng/L – < 22.6 ng/L · calculated | 77.3 ng/L | Peyraud | SYND ANN. SERR. UDI TERRES CARREES |
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 12 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 6.8 mg/L | ≤ 50 mg/L | within the limit |
| Arsenic | <2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within the limit |
| Fluoride | 0.32 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 | 7.9 unité pH | 6.5–9 unité pH | within the limit |
| Electrical conductivity | 489 µS/cm | 200–1,100 µS/cm | within the limit |
| Sodium | 11.8 mg/L | ≤ 200 mg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Clair safe to drink?
Yes. At the check on 23 July 2026, the tap water in Saint-Clair 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 Saint-Clair's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 39 ng/L. The EU limit is 100 ng/L, so this water is at 39 % of the limit. (below the EU limit)
Does the water in Saint-Clair also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 22 ng/L. That is 5.5 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 Saint-Clair's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 24 ng/L (19 August 2025) to 18 ng/L (7 April 2026) across 6 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Saint-Clair?
No hardness value is available for Saint-Clair 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 28 September 2026.
Same water network
Same distribution network as Saint-Clair, so in principle the same water.
Nearby communes
The closest to Saint-Clair 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=07225
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 September 2026
- Supply networks
- SYND ANN. SERR. UDI TERRES CARREES, SYND ANN. SERR. UDI LIMONY
Water report for Saint-Clair
Get new PFAS results for Saint-Clair, 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.