PFAS in Voiron's tap water: 20 ng/L, 40x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
40× 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 Chirens, on the same distribution network as Voiron (VOIRON ST JOSEPH ANCIEN HOPITAL). 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 98% of the cities we track
checked on 17 March 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-octanoïque (PFOA) | 0.02 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 22 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 17 March 2026
- Water supplier
- CA DU PAYS VOIRONNAIS
In Voiron, the 4 most closely watched PFAS (PFAS-4) add up to 20 ng/L (0.02 µg/L) at the latest PFAS check on 17 March 2026. That's 40 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 22 ng/L (0.022 µg/L), below the EU legal limit (100 ng/L). Sampled in Chirens, on the same network. 9 checks since 4 August 2025: PFAS-4 up to 42 ng/L, sometimes below the detection limit, averaging at least 23.4 ng/L over 12 months (non-detects as 0). 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 Voiron
15 PFAS checks since 10 December 2024, from the published measurements. Samples from 4 communes on the same network: it's the same water, so each one applies to Voiron. Samples come from 4 distribution networks. The trend refers to the network “VOIRON ST JOSEPH ANCIEN HOPITAL”.
“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 |
|---|---|---|---|---|
| 20 ng/L | 22 ng/L | Chirens | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| 20 ng/L | 22 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| < 4 ng/L | < 29 ng/L | Voiron | VOIRON BAS SERVICE | |
| < 4 ng/L | < 29 ng/L | Voiron | VOIRON SOUILLETS | |
| < 4 ng/L | < 29 ng/L | Tullins | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| 25 ng/L – < 28 ng/L · calculated | 27 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| < 4 ng/L | < 29 ng/L | Voiron | VOIRON BAS SERVICE | |
| 8 ng/L | 14 ng/L | Chirens | SERVICE CHIRENS | |
| 42 ng/L | 48 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| 35 ng/L | 39 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| < 4 ng/L · calculated | 1 ng/L | Voiron | VOIRON BAS SERVICE | |
| 8 ng/L – < 10 ng/L · calculated | 14 ng/L | Chirens | SERVICE CHIRENS |
Show the 3 earlier checks (back to 10 December 2024)
| 22 ng/L – < 25 ng/L · calculated | 26 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| 17 ng/L – < 20 ng/L · calculated | 23 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL | |
| 19 ng/L – < 21 ng/L · calculated | 22 ng/L | Saint-Étienne-de-Crossey | VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON ST JOSEPH ANCIEN HOPITAL |
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 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 5.1 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 | <0,010 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 | <5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.05 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 | 7.5 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 20.04 °f | no limit | for reference |
| Electrical conductivity | 408 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 4.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 4.7 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 3.2 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.22 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Voiron safe to drink?
Yes. At the check on 28 July 2026, the tap water in Voiron 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 Voiron's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 22 ng/L. The EU limit is 100 ng/L, so this water is at 22 % of the limit. (below the EU limit)
Does the water in Voiron also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 20 ng/L. That is 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 Voiron's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 35 ng/L (4 August 2025) to 20 ng/L (17 March 2026) across 4 quantified checks. These history statistics use laboratory-published sums only.
How hard is the water in Voiron?
The water hardness in Voiron is 20 °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 Voiron, so in principle the same water.
Nearby communes
The closest to Voiron 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=38563
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SERVICE CHIRENS, VOIRON ST JOSEPH ANCIEN HOPITAL, VOIRON BAS SERVICE, VOIRON SOUILLETS
Water report for Voiron
Get new PFAS results for Voiron, 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.