PFAS in the tap water of Saint-Sylvestre (Ardèche): 8 ng/L, 16x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
16× 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 Cornas, on the same distribution network as Saint-Sylvestre (SCPV GRANDE TRAVERSE). 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 95% of the cities we track
checked on 31 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorohexanoïque (PFHXA) | 0.009 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.008 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.004 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.003 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.003 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
Fails a current legal limit. Here are some filter options.
- EU legal limit
- 31 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 31 July 2026
- Water supplier
- VEOLIA EAU SAINT PERAY
In Saint-Sylvestre, the 4 most closely watched PFAS (PFAS-4) add up to 8 ng/L (0.008 µg/L) at the latest PFAS check on 31 July 2026. That's 16 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 31 ng/L (0.031 µg/L), below the EU legal limit (100 ng/L). Sampled in Cornas, on the same network. 7 checks since 25 August 2025: PFAS-4 from 6 ng/L to 17 ng/L, averaging 10 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-Sylvestre
8 PFAS checks since 22 May 2025, from the published measurements. Samples from 4 communes on the same network: it's the same water, so each one applies to Saint-Sylvestre. Samples come from 2 distribution networks. The trend refers to the network “SCPV GRANDE TRAVERSE”.
“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 |
|---|---|---|---|---|
| 8 ng/L | 31 ng/L | Cornas | SCPV GRANDE TRAVERSE | |
| 10 ng/L | 39 ng/L | Saint-Sylvestre | SCPV ST SYLVESTRE LESTRAT | |
| 8 ng/L | 32 ng/L | Gilhoc-sur-Ormèze | SCPV ST SYLVESTRE LESTRAT | |
| 10 ng/L | 39 ng/L | Cornas | SCPV GRANDE TRAVERSE | |
| 6 ng/L | 16 ng/L | Saint-Péray | SCPV GRANDE TRAVERSE | |
| 9 ng/L | 30 ng/L | Saint-Péray | SCPV GRANDE TRAVERSE | |
| 17 ng/L | 49 ng/L | Cornas | SCPV GRANDE TRAVERSE | |
| 5 ng/L – < 7 ng/L · calculated | 18 ng/L | Saint-Péray | SCPV GRANDE TRAVERSE |
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 over at least one limit.
See all 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 11.6 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Arsenic | 0.87 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 |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.14 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 | 7.47 unité pH | 6.5–9.5 pH | within the limit |
| Water hardness | 22 °f | no limit | for reference |
| Electrical conductivity | 451 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 10.2 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 20.7 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 8.1 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.15 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Sylvestre safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation non-conforme aux exigences de qualité.”
How high are PFAS levels in Saint-Sylvestre's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 31 ng/L. The EU limit is 100 ng/L, so this water is at 31 % of the limit. (below the EU limit)
Does the water in Saint-Sylvestre also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 8 ng/L. That is 2 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-Sylvestre's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 17 ng/L (25 August 2025) to 8 ng/L (31 July 2026) across 5 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Saint-Sylvestre?
The water hardness in Saint-Sylvestre is 22 °f (medium). 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 Saint-Sylvestre, so in principle the same water.
Nearby communes
The closest to Saint-Sylvestre 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=07297
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SCPV ST SYLVESTRE LESTRAT, SCPV CORNAS RESEAU GENERAL, SCPV GRANDE TRAVERSE
Water report for Saint-Sylvestre
Get new PFAS results for Saint-Sylvestre, 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.