PFAS in the tap water of Serrières (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 Serrières (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 Serrières, 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 Serrières
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 Serrières. 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 14 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 14 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/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 | 8.1 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 15.97 °f | no limit | for reference |
| Electrical conductivity | 331 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 16 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 23 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 11.3 mg/L | ≤ 200 mg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Serrières safe to drink?
Yes. At the check on 23 July 2026, the tap water in Serrières was within every limit tested. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité.”
How high are PFAS levels in Serrières'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 Serrières 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 Serrières'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 Serrières?
The water hardness in Serrières is 16 °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 28 September 2026.
Same water network
Same distribution network as Serrières, so in principle the same water.
Nearby communes
The closest to Serrières 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=07313
- 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 Serrières
Get new PFAS results for Serrières, 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.