PFAS in the tap water of Châteauneuf (Loire): 21 ng/L, 42x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
42× 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 Panissières, on the same distribution network as Châteauneuf (CHATEAUNEUF SIMOLY). 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 99% of the cities we track
checked on 6 January 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorohexanoïque (PFHXA) | 0.014 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.01 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.009 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.008 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.006 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.004 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.004 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 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 perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 57 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 6 January 2026
- Water supplier
- CHOLTON S.A.
In Châteauneuf, the 4 most closely watched PFAS (PFAS-4) add up to 21 ng/L (0.021 µg/L) at the latest PFAS check on 6 January 2026. That's 42 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 57 ng/L (0.057 µg/L), below the EU legal limit (100 ng/L). Sampled in Panissières, on the same network. 6 checks since 18 September 2025: PFAS-4 up to 26 ng/L, sometimes below the detection limit, averaging 23.33 ng/L over 12 months. No clear trend. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Châteauneuf
19 PFAS checks since 7 December 2023, from the published measurements. Samples from 7 communes on the same network: it's the same water, so each one applies to Châteauneuf. Samples come from 3 distribution networks. The trend refers to the network “CHATEAUNEUF SIMOLY”.
“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 |
|---|---|---|---|---|
| 21 ng/L | 57 ng/L | Panissières | CHATEAUNEUF SIMOLY | |
| 23 ng/L | 61 ng/L | Pouilly-lès-Feurs | CHATEAUNEUF SIMOLY | |
| < 4 ng/L | < 29 ng/L | La Terrasse-sur-Dorlay | CHATEAUNEUF SI MVG | |
| < 4 ng/L | < 29 ng/L | La Terrasse-sur-Dorlay | CHATEAUNEUF SI MVG | |
| 1 ng/L | 4 ng/L | Châteauneuf | 042000021, 042000021 | |
| 26 ng/L | 78 ng/L | Jas | CHATEAUNEUF SIMOLY | |
| < 4 ng/L · calculated | < 29 ng/L | Châteauneuf | 042000021, 042000021 | |
| < 4 ng/L · calculated | < 28 ng/L | La Terrasse-sur-Dorlay | CHATEAUNEUF SI MVG | |
| 25 ng/L – < 26 ng/L · calculated | 70 ng/L | Saint-Médard-en-Forez | CHATEAUNEUF SIMOLY | |
| < 4 ng/L · calculated | 6 ng/L | La Terrasse-sur-Dorlay | CHATEAUNEUF SI MVG | |
| < 4 ng/L · calculated | 4 ng/L | Châteauneuf | 042000021, 042000021 | |
| 23 ng/L – < 24 ng/L · calculated | 62 ng/L | Saint-Romain-en-Jarez | CHATEAUNEUF SIMOLY |
Show the 7 earlier checks (back to 7 December 2023)
| < 4 ng/L · calculated | < 100 ng/L | Châteauneuf | 042000021, 042000021 | |
| < 4 ng/L · calculated | < 100 ng/L | Châteauneuf | 042000021, 042000021 | |
| 31 ng/L – < 32 ng/L · calculated | 81 ng/L | Pouilly-lès-Feurs | CHATEAUNEUF SIMOLY | |
| 26 ng/L – < 27 ng/L · calculated | 80 ng/L | Jas | CHATEAUNEUF SIMOLY | |
| 24 ng/L – < 25 ng/L · calculated | 64.4 ng/L | Saint-Médard-en-Forez | CHATEAUNEUF SIMOLY | |
| 16.7 ng/L – < 17.7 ng/L · calculated | 52.7 ng/L | Saint-Romain-en-Jarez | CHATEAUNEUF SIMOLY | |
| 16.7 ng/L – < 17.7 ng/L · calculated | 52.1 ng/L | Pouilly-lès-Feurs | CHATEAUNEUF SIMOLY |
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.
Outside a reference value: Iron 209 µg/L on 22 April 2026 (reference ≤ 200 µg/L). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Iron | 209 µg/L | ≤ 200 µg/L | above the reference value |
See all 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 15.7 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | 0.01 mg/L | ≤ 0.5 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 | 0.14 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 | 8.11 unité pH | 6.5–9.5 pH | within the limit |
| Water hardness | 11.44 °f | no limit | for reference |
| Electrical conductivity | 323 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 32.4 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 12.7 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 15.6 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 209 µg/L | ≤ 200 µg/L | above the reference value |
| Turbidity | 0.12 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Châteauneuf safe to drink?
Yes. At the check on 15 July 2026, the tap water in Châteauneuf was within every limit tested. Outside a reference value: Iron 209 µg/L on 22 April 2026 (reference ≤ 200 µg/L). These are indicator parameters with reference values, not legal limits. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Châteauneuf's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 57 ng/L. The EU limit is 100 ng/L, so this water is at 57 % of the limit. (below the EU limit)
Does the water in Châteauneuf also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 21 ng/L. That is 5.3 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 Châteauneuf's tap water?
No clear trend. Since 7 December 2023, 6 checks have been published; on the main network the PFAS-4 sum ranged between 21 ng/L and 26 ng/L (3 quantified values), at times below the detection limit. pfasnearme only reports a trend from a change of at least 25 % and 1 ng/L. These history statistics use laboratory-published sums only.
How hard is the water in Châteauneuf?
The water hardness in Châteauneuf is 11.4 °f (soft). 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 Châteauneuf, so in principle the same water.
Nearby communes
The closest to Châteauneuf 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=42053
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CHATEAUNEUF SI MVG, CHATEAUNEUF SIMOLY, CHATEAUNEUF RIVE DE GIER, SEM MOYENNE VALLEE GIER DORLAY, SEM MVG CHATEAUNEUF COUZON, SEM MVG CHATEAUNEUF SIEMLY
Water report for Châteauneuf
Get new PFAS results for Châteauneuf, 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.