PFAS in Les Côtes-d'Arey's tap water: 1 ng/L, 2x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
2× 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 Vienne, on the same distribution network as Les Côtes-d'Arey (VIENNE COTES D'AREY HS REVENTIN LA BALME). 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 82% of the cities we track
checked on 3 April 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 1 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 3 April 2026
- Water supplier
- VIENNE CONDRIEU AGGLOMERATION
In Les Côtes-d'Arey, the 4 most closely watched PFAS (PFAS-4) add up to 1 ng/L (0.001 µg/L) at the latest PFAS check on 3 April 2026. That's 2 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 1 ng/L (0.001 µg/L), below the EU legal limit (100 ng/L). Sampled in Vienne, on the same network. 5 checks since 25 August 2025: PFAS-4 from 1 ng/L to 2 ng/L, averaging 1.5 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 Les Côtes-d'Arey
16 PFAS checks since 14 May 2024, from the published measurements. Samples from 3 communes on the same network: it's the same water, so each one applies to Les Côtes-d'Arey. Samples come from 2 distribution networks. The trend refers to the network “VIENNE COTES D'AREY HS REVENTIN LA BALME”.
“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 |
|---|---|---|---|---|
| 1 ng/L | 1 ng/L | Vienne | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| 2 ng/L | 2 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| < 4 ng/L · calculated | < 29 ng/L | Les Côtes-d'Arey | COTES D'AREY PRINCIPAL | |
| 1 ng/L | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| 2 ng/L | 2 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| 2 ng/L | 2 ng/L | Les Côtes-d'Arey | COTES D'AREY PRINCIPAL | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| < 4 ng/L · calculated | < 28 ng/L | Les Côtes-d'Arey | COTES D'AREY PRINCIPAL | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| < 4 ng/L · calculated | < 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME |
Show the 4 earlier checks (back to 14 May 2024)
| < 4 ng/L · calculated | 1 ng/L | Les Côtes-d'Arey | COTES D'AREY PRINCIPAL | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME | |
| 2 ng/L – < 5 ng/L · calculated | 2 ng/L | Les Côtes-d'Arey | COTES D'AREY PRINCIPAL | |
| 1 ng/L – < 4 ng/L · calculated | 1 ng/L | Estrablin | VIENNE COTES D'AREY HS REVENTIN LA BALME, VIENNE COTES D'AREY HS REVENTIN LA BALME |
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.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 27 mg/L | ≤ 50 mg/L | within the limit |
See all 20 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 27 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.998 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/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 | N.M. µg/L | ≤ 6 µg/L | no verdict |
| Fluoride | 0.09 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 | 7.8 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 27.35 °f | no limit | for reference |
| Electrical conductivity | 522 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 10 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 11.6 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 5.3 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Les Côtes-d'Arey safe to drink?
Yes. At the check on 22 July 2026, the tap water in Les Côtes-d'Arey 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 Les Côtes-d'Arey's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 1 ng/L. The EU limit is 100 ng/L, so this water is at 1 % of the limit. (below the EU limit)
Does the water in Les Côtes-d'Arey 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 1 ng/L stays below.
Are PFAS levels rising in Les Côtes-d'Arey's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 2 ng/L (28 August 2025) to 1 ng/L (3 April 2026) across 4 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Les Côtes-d'Arey?
The water hardness in Les Côtes-d'Arey is 27.4 °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 Les Côtes-d'Arey, so in principle the same water.
Nearby communes
The closest to Les Côtes-d'Arey 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=38131
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- VIENNE COTES D'AREY HS REVENTIN LA BALME, COTES D'AREY PRINCIPAL
Water report for Les Côtes-d'Arey
Get new PFAS results for Les Côtes-d'Arey, 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.